115807112172 has 18 divisors (see below), whose sum is σ = 292734644748. Its totient is φ = 38602370712.

The previous prime is 115807112111. The next prime is 115807112219. The reversal of 115807112172 is 271211708511.

115807112172 is a `hidden beast` number, since 1 + 1 + 580 + 7 + 1 + 1 + 2 + 1 + 72 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-3 number, since 3×115807112172³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 3216864227 = 115807112172 / (1 + 1 + 5 + 8 + 0 + 7 + 1 + 1 + 2 + 1 + 7 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1608432078 + ... + 1608432149.

Almost surely, 2^115807112172 is an apocalyptic number.

115807112172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

115807112172 is an abundant number, since it is smaller than the sum of its proper divisors (176927532576).

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

115807112172 is a wasteful number, since it uses less digits than its factorization.

115807112172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216864237 (or 3216864232 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 36.

The spelling of 115807112172 in words is "one hundred fifteen billion, eight hundred seven million, one hundred twelve thousand, one hundred seventy-two".