A Sesexagintaducentillion (1 Sesexagintaducentillion) is 10 to the power of 801 (10^801). This is an excessively astronomical number!

## How many zeros in a Sesexagintaducentillion?

There are 801 zeros in a Sesexagintaducentillion.

## What's before Sesexagintaducentillion?

A Quinsexagintaducentillion is smaller than a Sesexagintaducentillion.

## What's after Sesexagintaducentillion?

A Septensexagintaducentillion is larger than a Sesexagintaducentillion.

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

## Is Sesexagintaducentillion the largest number?

Sesexagintaducentillion 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.

## Sesexagintaducentillion written out

Sesexagintaducentillion is written out as:

1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000

## Big Numbers

This is just one of many really big numbers!