9172117956 has 12 divisors (see below), whose sum is σ = 21401608592. Its totient is φ = 3057372648.

The previous prime is 9172117943. The next prime is 9172117973. The reversal of 9172117956 is 6597112719.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382171570 + ... + 382171593.

Almost surely, 2^9172117956 is an apocalyptic number.

It is an amenable number.

9172117956 is an abundant number, since it is smaller than the sum of its proper divisors (12229490636).

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

9172117956 is a wasteful number, since it uses less digits than its factorization.

9172117956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764343170 (or 764343168 counting only the distinct ones).

The product of its digits is 238140, while the sum is 48.

The square root of 9172117956 is about 95771.1749745193. The cubic root of 9172117956 is about 2093.2601725573.

The spelling of 9172117956 in words is "nine billion, one hundred seventy-two million, one hundred seventeen thousand, nine hundred fifty-six".