A
quadrillion is a million, million, million, millions or 10^24 from quad for four, you see a
quadbike does not have
two and a half wheels, just as a tricycle does not have two wheels (...look up trillion).
A
quadrillion dollars is a
million, million, million, millions of dollars or $1,
000 000, 000 000, 000 000, 000 000.