64138512 has 40 divisors (see below), whose sum is σ = 167312704. Its totient is φ = 21170304.

The previous prime is 64138483. The next prime is 64138523. The reversal of 64138512 is 21583146.

It is a super-2 number, since 2×64138512² = 8227497443148288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64138512.

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, 1543 + ... + 11430.

Almost surely, 2^64138512 is an apocalyptic number.

It is an amenable number.

64138512 is an abundant number, since it is smaller than the sum of its proper divisors (103174192).

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

64138512 is a wasteful number, since it uses less digits than its factorization.

64138512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13087 (or 13081 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

The square root of 64138512 is about 8008.6523210837. The cubic root of 64138512 is about 400.2883587398.

The spelling of 64138512 in words is "sixty-four million, one hundred thirty-eight thousand, five hundred twelve".