115890999172 has 24 divisors (see below), whose sum is σ = 219372140736. Its totient is φ = 53252517408.

The previous prime is 115890999163. The next prime is 115890999233. The reversal of 115890999172 is 271999098511.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 115890999172.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4897168 + ... + 4920775.

It is an arithmetic number, because the mean of its divisors is an integer number (9140505864).

Almost surely, 2^115890999172 is an apocalyptic number.

It is an amenable number.

115890999172 is a deficient number, since it is larger than the sum of its proper divisors (103481141564).

115890999172 is a wasteful number, since it uses less digits than its factorization.

115890999172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9818187 (or 9818185 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 61.

The spelling of 115890999172 in words is "one hundred fifteen billion, eight hundred ninety million, nine hundred ninety-nine thousand, one hundred seventy-two".