1e15

1e15, also known as one quintillion, is a numerical value that represents one followed by fifteen zeros. It is a member of the long scale of numbers, where each power of ten is named by combining a multiple of three with the suffix "-illion". In the long scale, 1e15 is called a quintillion, while in the short scale, which is more commonly used in English-speaking countries, it is called a quadrillion. The term "quintillion" comes from the Latin word "quintus", meaning fifth, reflecting its position in the sequence of powers of ten. In scientific notation, 1e15 is written as 1 x 10^15, where the exponent 15 indicates the number of places the decimal point moves to the right of the number 1. This number is significantly larger than most everyday quantities, but it is still a relatively small number in the context of the universe, where distances and quantities can span many orders of magnitude.