Definition of


A million million millions.

1,000,000 x 1,000,000 x 1,000,000 = 1,000,000,000,000,000,000

Which is a 1 followed by 18 zeros

Using scientific notation: 1 × 1018

We could also think of it as a million trillion or a billion billion.

• our Milky Way Galaxy is about a quintillion meters wide
• the volume of Earth's oceans is 1.35 quintillion cubic meters
• there are about 10 quintillion insects on Earth

The prefix "exa-" means a quintillion. Example: an exameter is a quintillion meters.

Below is a cube made of a million smaller cubes. If each of the small cubes is worth a trillion dollars, then the whole cube is worth a quintillion dollars.
See: Million

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