63081623664 has 80 divisors (see below), whose sum is σ = 190597523200. Its totient is φ = 19920510144.

The previous prime is 63081623653. The next prime is 63081623707. The reversal of 63081623664 is 46632618036.

63081623664 is a `hidden beast` number, since 630 + 8 + 1 + 6 + 2 + 3 + 6 + 6 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3834484 + ... + 3850899.

It is an arithmetic number, because the mean of its divisors is an integer number (2382469040).

Almost surely, 2^63081623664 is an apocalyptic number.

It is an amenable number.

63081623664 is an abundant number, since it is smaller than the sum of its proper divisors (127515899536).

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

63081623664 is a wasteful number, since it uses less digits than its factorization.

63081623664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7685419 (or 7685407 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 45.

The spelling of 63081623664 in words is "sixty-three billion, eighty-one million, six hundred twenty-three thousand, six hundred sixty-four".