IPA: /ˌɒk.təʊ.dɪˈsɪl.jən/
KK: /ɑkˌtoʊˈdɛsɪljən/
A very large number that is equal to 10 raised to the power of 57, or 1 followed by 57 zeros.
In mathematics, an octodecillion is used to describe extremely large quantities.
Octodecillion → It is formed from "octo-" (from Latin *octo*, meaning eight) and "decillion" (from Latin *decem*, meaning ten, combined with the suffix "-illion" which denotes a large number). The word "octodecillion" refers to the number represented by 10 to the power of 57, which is eight times ten raised to the power of ten.
Think of 'eight' ('octo-') combined with 'ten' ('decillion') to remember that 'octodecillion' represents a number that is eight times ten raised to a large power.