Nonillion vs. Octillion

1030.

(dated British & Australian, long scale) 1054.

(hyperbole) An unspecified very large number.

According to the French and American notation, a thousand octillions, or a unit with thirty ciphers annexed; according to the English notation, a million octillions, or a unit with fifty-four ciphers annexed. See the Note under Numeration.

A thousand trillion trillion, a billion billion billion: 1 followed by 27 zeros, 1027.

A trillion quintillion: 1 followed by 48 zeros, 1048.

According to the French method of numeration (which method is followed also in the United States) the number expressed by a unit with twenty-seven ciphers annexed. According to the English method, the number expressed by a unit with forty-eight ciphers annexed. See Numeration.