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A Octillion (1 Octillion) is 10 to the power of 27 (10^27). This is an extremely large number!

How many zeros in a Octillion?

There are 27 zeros in a Octillion.

What's before Octillion?

A Septillion is smaller than a Octillion.

What's after Octillion?

A Nonillion is larger than a Octillion.


A Octillionaire is someone whos assets, net worth or wealth is 1 or more Octillion. It is unlikely anyone will ever be a true Octillionaire. If you want to be a Octillionaire, play Tap Tales!

Is Octillion the largest number?

Octillion is not the largest number. Infinity best describes the largest possible number - if there even is one! We cannot comprehend what the largest number actually is.

Octillion written out

Octillion is written out as:


Big Numbers

This is just one of many really big numbers!

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