115657988865 has 16 divisors (see below), whose sum is σ = 188544345408. Its totient is φ = 60520406336.

The previous prime is 115657988861. The next prime is 115657988879. The reversal of 115657988865 is 568889756511.

It is a cyclic number.

It is not a de Polignac number, because 115657988865 - 2² = 115657988861 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115657988865.

It is not an unprimeable number, because it can be changed into a prime (115657988861) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72740079 + ... + 72741668.

It is an arithmetic number, because the mean of its divisors is an integer number (11784021588).

Almost surely, 2^115657988865 is an apocalyptic number.

115657988865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115657988865 is a deficient number, since it is larger than the sum of its proper divisors (72886356543).

115657988865 is a wasteful number, since it uses less digits than its factorization.

115657988865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145481808.

The product of its digits is 145152000, while the sum is 69.

The spelling of 115657988865 in words is "one hundred fifteen billion, six hundred fifty-seven million, nine hundred eighty-eight thousand, eight hundred sixty-five".