63
The number must be 42.
I suggest you just call it that - a "35-digit number".
I would just call it a "400-digit number".
The value of a digit in a number is called its place value.
If your asking in a digit it's called a 4 digit number and it is the smallest 4 digit number
63
It is called a 28-digit number!
It is called a twelve-digit number. Its exact name will depend on the number.
40
Probably 73.
A 22 digit number is called a quintillion.
The number must be 42.
Calling it "17-digit number" is just fine.
I suggest you just call it that - a "35-digit number".
I would just call it a "400-digit number".
40*24 = 960 and 960/40 = 24