octodecillion

10⁵⁷.

1962, David Bergamini, The Universe, Time-Life Books, Google Books considers page number to be top-secret The reason is that the rays created in the core are softened on their outward journey by being handled by the octodecillion-odd atoms of gas outside the core that are part of the sun but play no part in the central fusions.

How many Stars Shine on Tiny Jennifer’s Hair? ... Two million, three hundred and forty nine thousand, eight hundred seventy five vigintillion, seven hundred fifty four novemdecillion, five hundred forty three octodecillion, four hundred fifty seven septendecillion...

10¹⁰⁸.