Quindecillion is a number represented in decimal notation by a unit with 48 or 90 zeros:
- a number represented by a unit with 48 zeros ( , a thousand quattuordecillion in the short-scale number naming system (including in Russia);
- number represented by a unit with 90 zeros ( ) in the system of naming numbers with a long scale.
In SI system number correspond to the prefix “vran” or “raven”.