63989090920 has 32 divisors (see below), whose sum is σ = 145296340200. Its totient is φ = 25360812288.

The previous prime is 63989090911. The next prime is 63989090999. The reversal of 63989090920 is 2909098936.

It can be written as a sum of positive squares in 4 ways, for example, as 63235149156 + 753941764 = 251466^2 + 27458^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7333839 + ... + 7342558.

Almost surely, 2^63989090920 is an apocalyptic number.

It is an amenable number.

63989090920 is an abundant number, since it is smaller than the sum of its proper divisors (81307249280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63989090920 is a wasteful number, since it uses less digits than its factorization.

63989090920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14676517 (or 14676513 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 55.

The spelling of 63989090920 in words is "sixty-three billion, nine hundred eighty-nine million, ninety thousand, nine hundred twenty".