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Words for numbers above 10¹⁸ may be found in dictionaries or tables of number names, but are almost never used. For years, mathematicians and computer scientists have enjoyed a sort of game of inventing systems for naming large numbers, but there is no practical need to render such names as words, and it is very questionable whether any of them should be considered to be "real" words; they are usually encountered only in discussions of large numbers and number naming.

Words for numbers above 10¹⁸ may be found in dictionaries or tables of number names, but are almost never used. For years, mathematicians and computer scientists have enjoyed a sort of game of inventing systems for naming large numbers, but there is no practical need to render such names as words, and it is very questionable whether any of them should be considered to be "real" words; they are seldom encountered outside of discussions of large numbers and number naming.

The name ''googol,'' for a 1 followed by a hundred zeroes, i.e. 10¹⁰⁰, was popularized by a 1940 popular book on mathematics, Kasner and Newman's classic ''Mathematics and the Imagination.'' It was invented by Kasner's nine-year-old nephew. It and Kasner's own ''googolplex'' (a 1 followed by googol of zeroes) have entered the language, but are only used figuratively. The word ''googol'' was the inspiration for the name of the search service ''Google.''

The name ''googol,'' for a 1 followed by a hundred zeroes, i.e. 10¹⁰⁰, was popularized by a 1940 popular book on mathematics, Kasner and Newman's classic ''Mathematics and the Imagination.'' It was invented by Kasner's nine-year-old nephew. It and Kasner's own ''googolplex'' (a 1 followed by googol of zeroes) have entered the language, but are only used figuratively. The word ''googol'' was the inspiration for the name of the search service ''Google.''