118915865 has 16 divisors (see below), whose sum is σ = 149603328. Its totient is φ = 90568896.

The previous prime is 118915847. The next prime is 118915873. The reversal of 118915865 is 568519811.

It is a cyclic number.

It is not a de Polignac number, because 118915865 - 2⁶ = 118915801 is a prime.

It is a Duffinian number.

It is a Curzon 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, 23327 + ... + 27963.

It is an arithmetic number, because the mean of its divisors is an integer number (9350208).

Almost surely, 2^118915865 is an apocalyptic number.

It is an amenable number.

118915865 is a deficient number, since it is larger than the sum of its proper divisors (30687463).

118915865 is a wasteful number, since it uses less digits than its factorization.

118915865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4888.

The product of its digits is 86400, while the sum is 44.

The square root of 118915865 is about 10904.8551113713. The cubic root of 118915865 is about 491.7525263569.

The spelling of 118915865 in words is "one hundred eighteen million, nine hundred fifteen thousand, eight hundred sixty-five".