65115864 has 48 divisors (see below), whose sum is σ = 192390120. Its totient is φ = 19731840.

The previous prime is 65115863. The next prime is 65115887. The reversal of 65115864 is 46851156.

65115864 is a `hidden beast` number, since 65 + 11 + 586 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65115863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40317 + ... + 41900.

Almost surely, 2^65115864 is an apocalyptic number.

It is an amenable number.

65115864 is an abundant number, since it is smaller than the sum of its proper divisors (127274256).

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

65115864 is a wasteful number, since it uses less digits than its factorization.

65115864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82240 (or 82233 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 65115864 is about 8069.4401292779. The cubic root of 65115864 is about 402.3113352654.

The spelling of 65115864 in words is "sixty-five million, one hundred fifteen thousand, eight hundred sixty-four".