63139664 has 20 divisors (see below), whose sum is σ = 139809504. Its totient is φ = 27059808.

The previous prime is 63139639. The next prime is 63139691. The reversal of 63139664 is 46693136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281762 + ... + 281985.

Almost surely, 2^63139664 is an apocalyptic number.

It is an amenable number.

63139664 is an abundant number, since it is smaller than the sum of its proper divisors (76669840).

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

63139664 is a wasteful number, since it uses less digits than its factorization.

63139664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563762 (or 563756 counting only the distinct ones).

The product of its digits is 69984, while the sum is 38.

The square root of 63139664 is about 7946.0470675676. The cubic root of 63139664 is about 398.1995413644.

The spelling of 63139664 in words is "sixty-three million, one hundred thirty-nine thousand, six hundred sixty-four".