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Not to be confused with yoctillion.

An octillion is equal to 1027 in America, or 1048 in France and Germany.[1]

A square of 1027 square centimeters in area compared to the average orbital distances of the inner planets. The sun is drawn at a scale about 50x larger and the planets at a scale about 500x larger than the remainder of the diagram.

A radius of 1027 meters, compared to the observable universe

In the long scale, 1027 is called quadrilliard, which is commonly used in France and Germany.

Both Russ Rowlett's Greek-based naming system[2] and Aarex Tiaokhiao's googology site[3] give the name ennillion for this number.

Wikia user NumLynx gave the name nonasand for this number's short scale value.[4]

The number (in short scale) is also called tre-bitillion by SuperJedi224.[5]

It is 28 digits long in short scale, and 49 digits long in long scale.

Decimal

  • 1,000,000,000,000,000,000,000,000,000 - short scale
  • 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000 - long scale

Examples

  • The earth has a mass of about 5.98 octillion grams.
  • The mass of the sun is about 1.989 octillion metric tons.
  • The volume of the sun is about 1.412 octillion cubic meters.[6]
  • An octillion dollars in 100 dollar bills would cover the US with a layer of 1000 km (625 miles) thick.
  • A square of one octillion square centimeters in area would fit entirely inside the orbit of Mars (the diagonal of such a square would be about 2% smaller than the minor axis of its orbit).
  • There are over 7 octillion atoms in the human body.
  • There is over 169.5 octillion ways to play the first ten moves in chess.[7]
  • The Hungarian pengő had the highest rate of hyperinflation recorded, reaching 400 octilion pengős.

Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{27}\)
Arrow notation \(10\uparrow27\)
Steinhaus-Moser Notation 20[3] 21[3]
Copy notation 9[27] 10[14]
Taro's multivariable Ackermann function A(3,86) A(3,87)
Pound-Star Notation #*(2,8)*12 #*(0,0,2,2)*6
BEAF {10,27}
Hyper-E notation E27
Bashicu matrix system (0)(0)(0)[2371] (0)(0)(0)[2372]
Hyperfactorial array notation 26! 27!
Fast-growing hierarchy \(f_2(83)\) \(f_2(84)\)
Hardy hierarchy \(H_{\omega^2}(83)\) \(H_{\omega^2}(84)\)
Slow-growing hierarchy \(g_{\omega^{\omega2+7}}(10)\)

For long scale:

Notation Lower bound Upper bound
Scientific notation \(1\times10^{48}\)
Arrow notation \(10\uparrow48\)
Steinhaus-Moser Notation 31[3] 32[3]
Copy notation 9[48] 1[49]
Taro's multivariable Ackermann function A(3,156) A(3,157)
Pound-Star Notation #*(6,3,6,4,3)*7 #*(7,3,6,4,3)*7
BEAF {10,48}
Hyper-E notation E48
Bashicu matrix system (0)(0)(0)(0)[1000]
Hyperfactorial array notation 40! 41!
Fast-growing hierarchy \(f_2(152)\) \(f_2(153)\)
Hardy hierarchy \(H_{\omega^2}(152)\) \(H_{\omega^2}(153)\)
Slow-growing hierarchy \(g_{\omega^{\omega4+8}}(10)\)

Sources

See also

Main article: -illion
1–9: million · billion · trillion · quadr · quint · sext · sept · oct · non
10–19: decillion · undec · duodec · tredec · quattuordec · quindec · sexdec · septendec · octodec · novemdec
20–29: vigintillion · unvigint · duovigint · trevigint · quattuorvigint · quinvigint · sexvigint · septenvigint · octovigint · novemvigint
30–39: trigintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
40–49: quadragintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
50–59: quinquagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
60–69: sexagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
70–79: septuagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
80–89: octogintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
90–99: nonagintillion (un- · duo- · tre- · quattuor- · quin- · sex- · septen- · octo- · novem-)
100–900: centillion · unviginticent · unsexagintacent · ducent · trecent · duotrigintatrecent · quadringent · quingent · sescent · septuagintisescent · septingent · octingent · nongent
1,000–1024: millillion · dumill · dumillinonagintanongent · trimill · trimilliduotrigintatrecent · trimillisexoctogintaoctingent · quadrimill · quadrimilliquattuordecicent · quinmill · sexmill · septimill · octimill · nonimill · myr · decimilliquinsexagintasescent · dumyr · unquadragintamilliunquinquagintacent · centimill · micr · nan · pic · femt · att · zept · yoct
Numbers By SuperJedi224

Fibonacci Numbers

Pound-Star Notation

Based on the Faxul

Googovipleccix family

Graham Sequence Numbers

-Illion numbers

"-Illion" numbers by SuperJedi224

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