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The US short scale for a billion billion (quintillion) is 1,000,000,000,000,000,000 (1 x 1018).

The short scale adds new number names by thousands (a billion is 1000 million).

On the long scale (European), a billion billion is 1 followed by 24 zeroes (1 x 1024).

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Wiki User

11y ago
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15y ago

1000000000.

So that means 9 decimals.

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Wiki User

11y ago

Billions|Millions|Thousands|Hundreds

1,000,000,000

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Q: How do you write in numbers billion billion?
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