a Quadrillion is a 16 digit number
yes 16 digit number
The greatest 4-digit number that is divisible by 16 is 9984
I would just call it a "400-digit number".
I suggest you just call it that - a "35-digit number".
We call them by the number of their digits. Two-digit number, three-digit number and so on.
875
You would call it million.
16
thrillion
-1
16, which is the square of 4, is a two digit even number.
A doublelery