115515664 has 40 divisors (see below), whose sum is σ = 244895040. Its totient is φ = 52348800.

The previous prime is 115515661. The next prime is 115515667. The reversal of 115515664 is 466515511.

It is an interprime number because it is at equal distance from previous prime (115515661) and next prime (115515667).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115515661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73317 + ... + 74875.

It is an arithmetic number, because the mean of its divisors is an integer number (6122376).

Almost surely, 2^115515664 is an apocalyptic number.

It is an amenable number.

115515664 is an abundant number, since it is smaller than the sum of its proper divisors (129379376).

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

115515664 is a wasteful number, since it uses less digits than its factorization.

115515664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1993 counting only the distinct ones).

The product of its digits is 18000, while the sum is 34.

The square root of 115515664 is about 10747.8213606293. The cubic root of 115515664 is about 487.0201830830.

The spelling of 115515664 in words is "one hundred fifteen million, five hundred fifteen thousand, six hundred sixty-four".