64657855 has 16 divisors (see below), whose sum is σ = 81871200. Its totient is φ = 48885120.

The previous prime is 64657841. The next prime is 64657867. The reversal of 64657855 is 55875646.

It is not a de Polignac number, because 64657855 - 2⁵ = 64657823 is a prime.

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, 77581 + ... + 78409.

It is an arithmetic number, because the mean of its divisors is an integer number (5116950).

Almost surely, 2^64657855 is an apocalyptic number.

64657855 is a deficient number, since it is larger than the sum of its proper divisors (17213345).

64657855 is a wasteful number, since it uses less digits than its factorization.

64657855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1674.

The product of its digits is 1008000, while the sum is 46.

The square root of 64657855 is about 8041.0108195425. The cubic root of 64657855 is about 401.3658619939.

The spelling of 64657855 in words is "sixty-four million, six hundred fifty-seven thousand, eight hundred fifty-five".