Main article: Names of large numbers // The standard dictionary numbers Throughout this article, exponential or scientific notation is used. ...

A quintillion is a number written as either:

• a 1 followed by 18 zeros (10 to the 18th power, as used in the short scale system of numeration.

or

• a 1 followed by 30 zeros (10 to the 30th power, as used in the French system of numeration.

In the "short scale"), this number is equal to 1,000 quadrillion, or a billion billion. Long scale is the English translation of the French term échelle longue, which designates a system of numeric names in which the word billion means a million millions. ... The quadrillion is a large number which has one of two values depending on how or where it is being used. ...

• In the book Fast Food Nation, author Eric Schlosser claims a Geographic Information System named "Quintillion" is used by McDonald's to analyze data to help predict a new location for one of its restaurants. According to Schlosser, Quintillion uses data such as satellite photos, income, new housing plans, and road layouts to predict future incomes and population patterns.

See also

• Names of large numbers
• Long and short scales