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The number 1 followed by 15 zeros is known as a quadrillion in the short scale system used in the United States and modern English-speaking countries. In the long scale system used in some European countries, this number is called a thousand billion. It is represented as 10^15 in scientific notation.

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quadrillion

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Wiki User

16y ago
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Q: What is 1 followed by 15 zeros?
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