64015864 has 32 divisors (see below), whose sum is σ = 137836800. Its totient is φ = 27565920.

The previous prime is 64015859. The next prime is 64015871. The reversal of 64015864 is 46851046.

It is a congruent number.

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, 17472 + ... + 20815.

It is an arithmetic number, because the mean of its divisors is an integer number (4307400).

Almost surely, 2^64015864 is an apocalyptic number.

It is an amenable number.

64015864 is an abundant number, since it is smaller than the sum of its proper divisors (73820936).

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

64015864 is a wasteful number, since it uses less digits than its factorization.

64015864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38323 (or 38319 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 64015864 is about 8000.9914385656. The cubic root of 64015864 is about 400.0330472696.

The spelling of 64015864 in words is "sixty-four million, fifteen thousand, eight hundred sixty-four".