Number of Zeros In a Quadrillion

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How many zeros are there in a quadrillion?


The number 1 quadrillion has 15 zeros. Written in numerical notation, 1 quadrillion is equivalent to 1,000,000,000,000,000.  It is also sometimes called one thousand trillion and is written in scientific notation as 1×1015 or just 1015. The word billion comes from the 16th Century French word quadrillion which referred to ‘Ëœquadri (‘Å“four’) + (m)illion’â„¢.

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