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An undecillion is equal to 1036 in America, or 1066 in France and Germany.[1]

In the long scale, 1036 is called sextillion, which is commonly used in France and Germany.

This number is also called dodekillion in Russ Rowlett's Greek-based naming system.[2]

Aarex Tiaokhiao gave the name becillion, referring to the value of this number.[3]

1036 is also called Jian (澗 in Chinese) or Kan (かん in Japanese)[4] in both Japanese counting system and Chinese counting system.

Written out in decimal form undecillion (in the short scale) is:

1000000000000000000000000000000000000

In long scale:

1000000000000000000000000000000000000000000000000000000000000000000

## Decimal Edit

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

## Examples Edit

• The volume of the Betelguese red giant is roughly 1.21 undecillion cubic meters.[5]
• The electromagnetic interaction is around 1036 times stronger than gravity. The strong nuclear force is another 100 times stronger than that.
• The SI prefix doka- multiplies by one undecillion.

## Approximations Edit

For short scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{36}$$
Arrow notation $$10\uparrow36$$
Steinhaus-Moser Notation 25[3] 26[3]
Copy notation 9[36] 1[37]
Taro's multivariable Ackermann function A(3,116) A(3,117)
Pound-Star Notation #*(3,7,1,0,1)*6 #*(2,6,1,3,4)*5
BEAF {10,36}
Hyper-E notation E36
Bashicu matrix system (0)(0)(0)[31622] (0)(0)(0)[31623]
Hyperfactorial array notation 32! 33!
Fast-growing hierarchy $$f_2(112)$$ $$f_2(113)$$
Hardy hierarchy $$H_{\omega^2}(112)$$ $$H_{\omega^2}(113)$$
Slow-growing hierarchy $$g_{\omega^{\omega3+6}}(10)$$

For long scale:

Notation Lower bound Upper bound
Scientific notation $$1\times10^{66}$$
Arrow notation $$10\uparrow66$$
Steinhaus-Moser Notation 40[3] 41[3]
Copy notation 9[66] 1[67]
Taro's multivariable Ackermann function A(3,216) A(3,217)
Pound-Star Notation #*(10,4,2,2,0,1)*8 #*(10,0,6,3,4,4)*7
BEAF {10,66}
Hyper-E notation E66
Bashicu matrix system (0)(0)(0)(0)[13335] (0)(0)(0)(0)[13336]
Hyperfactorial array notation 50! 51!
Fast-growing hierarchy $$f_2(211)$$ $$f_2(212)$$
Hardy hierarchy $$H_{\omega^2}(211)$$ $$H_{\omega^2}(212)$$
Slow-growing hierarchy $$g_{\omega^{\omega6+6}}(10)$$

## List of prefixed numbers derived from decillion Edit

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