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A quattuordecillion is equal to 1045 in America, or 1084 in France and Germany.[1][2]

In the long scale, 1045 is called septilliard, which is commonly used in France and Germany.

This number is also called pentadekillion in Russ Rowlett's Greek-based naming system.[3]

Aarex Tiaokhiao gave the name pentecillion, referring to the value of this number.[4]

Sbiis Saibian gave the name gogolcrumb, referring to the short scale value of this number.[5]

## Decimal expansion

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

## Examples

• There are about 41.75 quattuordecillion water molecules in all the water on the earth.[6]
• The prefix tenapeta- multiplies by one quattuordecillion.

## Approximations

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{45}$$
Arrow notation $$10\uparrow45$$
Steinhaus-Moser Notation 30[3] 31[3]
Copy notation 9[45] 10[23]
Taro's multivariable Ackermann function A(3,146) A(3,147)
Pound-Star Notation #*(0,0,8,1)*10 #*(4,1,6,6,1)*7
BEAF {10,45}
Bashicu matrix system (0)(0)(0)(0)[649] (0)(0)(0)(0)[650]
Hyperfactorial array notation 38! 39!
Fast-growing hierarchy $$f_2(142)$$ $$f_2(143)$$
Hardy hierarchy $$H_{\omega^2}(142)$$ $$H_{\omega^2}(143)$$
Slow-growing hierarchy $$g_{\omega^{\omega4+5}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{84}$$
Arrow notation $$10\uparrow84$$
Steinhaus-Moser Notation 49[3] 50[3]
Copy notation 9[84] 1[85]
Taro's multivariable Ackermann function A(3,276) A(3,277)
Pound-Star Notation #*(10,1,0,0,0,4,3)*7 #*(6,0,0,9,1)*13
BEAF {10,84}
Bashicu matrix system (0)(0)(0)(0)[589] (0)(0)(0)(0)[590]
Hyperfactorial array notation 61! 62!
Fast-growing hierarchy $$f_2(270)$$ $$f_2(271)$$
Hardy hierarchy $$H_{\omega^2}(270)$$ $$H_{\omega^2}(271)$$
Slow-growing hierarchy $$g_{\omega^{\omega8+4}}(10)$$

## List of prefixed numbers derived from decillion

Name Short scale Long scale
undecillion 1036 1066
duodecillion 1039 1072
tredecillion 1042 1078
quattuordecillion 1045 1084
quindecillion 1048 1090
sexdecillion 1051 1096
septendecillion 1054 10102
octodecillion 1057 10108
novemdecillion 1060 10114

## Sources

-minutia group
n-ary numbers with multipliers
Eyelash mite group: eyelash mite-speck · eyelash mite-crumb · eyelash mite-chunk · (binary/ternary/octal)eyelash mite · eyelash mite-bunch · eyelash mite-crowd · eyelash mite-swarm
Dust mite group: dust mite-speck · dust mite-crumb · dust mite-chunk · (binary/ternary/octal)dust mite · dust mite-bunch · dust mite-crowd · dust mite-swarm
Cheese mite group: cheese mite-speck · cheese mite-crumb · cheese mite-chunk · (binary/ternary/octal)cheese mite · cheese mite-bunch · cheese mite-crowd · cheese mite-swarm
Clover mite group: clover mite-speck · clover mite-crumb · clover mite-chunk · (binary/ternary/octal)clover mite · clover mite-bunch · clover mite-crowd · clover mite-swarm
Pipsqueak group: (binary/ternary/octal)pipsqueak
Little squeaker group: (binary/ternary/octal)little squeaker
Small fry group: (binary/ternary/octal)small fry
Guppy group: (binary/ternary/octal)guppyspeck · (binary/ternary/octal)guppycrumb · (binary/ternary/octal)guppychunk · (ternary/quaternary/quinary/duodecimal/hexadecimal/vigesimal/sexagesimal)guppy(bit/byte)
Minnow group: (binary/ternary/octal)minnowspeck · (binary/ternary/octal)minnowcrumb · (binary/ternary/octal)minnowchunk · (ternary)minnow(bit/byte)
Goby group: (binary/ternary/octal)gobyspeck · (binary/ternary/octal)gobycrumb · (binary/ternary/octal)gobychunk · (ternary)goby(bit/byte)