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A septenquinquagintillion is equal to 10174 in the short scale, or 10342 in the long scale by Conway-Wechsler system.[1][2][3][4][5]

In the long scale which is commonly used in France and Germany, 10174 is called novemvigintillion.

Decimal expansion

In short scale:

1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

In long scale:

1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

Approximations

For the short scale value (10174):

Notation Lower bound Upper bound
Scientific notation \(1\times10^{174}\)
Arrow notation \(10\uparrow174\)
Steinhaus-Moser Notation 89[3] 90[3]
Copy notation 9[174] 1[175]
Taro's multivariable Ackermann function A(3,575) A(3,576)
Pound-Star Notation #*((24))*9 #*((25))*9
BEAF {10,174}
Hyper-E notation E174
Bashicu matrix system (0)(0)(0)(0)(0)(0)[523] (0)(0)(0)(0)(0)(0)[524]
Hyperfactorial array notation 107! 108!
Fast-growing hierarchy \(f_2(568)\) \(f_2(569)\)
Hardy hierarchy \(H_{\omega^2}(568)\) \(H_{\omega^2}(569)\)
Slow-growing hierarchy \(g_{\omega^{\omega^2+\omega7+4}}(10)\)

For the long scale value (10342):

Notation Lower bound Upper bound
Scientific notation \(1\times10^{342}\)
Arrow notation \(10\uparrow342\)
Steinhaus-Moser Notation 155[3] 156[3]
Copy notation 9[342] 1[343]
Taro's multivariable Ackermann function A(3,1133) A(3,1134)
Pound-Star Notation #*((21))*12 #*((22))*12
BEAF {10,342}
Hyper-E notation E342
Bashicu matrix system (0)(0)(0)(0)(0)(0)(0)[469] (0)(0)(0)(0)(0)(0)(0)[470]
Hyperfactorial array notation 185! 186!
Fast-growing hierarchy \(f_2(1\,125)\) \(f_2(1\,126)\)
Hardy hierarchy \(H_{\omega^2}(1\,125)\) \(H_{\omega^2}(1\,126)\)
Slow-growing hierarchy \(g_{\omega^{\omega^23+\omega4+2}}(10)\)

List of prefixed numbers derived from quinquagintillion

Name Short scale Long scale
unquinquagintillion 10156 10306
duoquinquagintillion 10159 10312
trequinquagintillion 10162 10318
quattuorquinquagintillion 10165 10324
quinquinquagintillion 10168 10330
sexquinquagintillion 10171 10336
septenquinquagintillion 10174 10342
octoquinquagintillion 10177 10348
novemquinquagintillion 10180 10354

Sources

  1. Conway and Guy. (1995) "The book of Numbers" Copernicus
  2. Steve Olsen, Big-Ass Numbers
  3. The Conway-Wechsler System
  4. Extensions to the -illions I: Henkle, Conway, and Rowlett
  5. Fish. Conway's zillion numbers, July 25, 2021

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
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