Create Free Account | Log In


A Septemviginticentillion (1 Septemviginticentillion) is 10 to the power of 384 (10^384). This is an excessively astronomical number!

How many zeros in a Septemviginticentillion?

There are 384 zeros in a Septemviginticentillion.

What's before Septemviginticentillion?

A Sesviginticentillion is smaller than a Septemviginticentillion.

What's after Septemviginticentillion?

A Octoviginticentillion is larger than a Septemviginticentillion.


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

Is Septemviginticentillion the largest number?

Septemviginticentillion 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.

Septemviginticentillion written out

Septemviginticentillion is written out as:


Big Numbers

This is just one of many really big numbers!

Play Now

Choose your device:

FREE to download and play!