11712512172 has 48 divisors (see below), whose sum is σ = 28119483392. Its totient is φ = 3792277440.

The previous prime is 11712512143. The next prime is 11712512183. The reversal of 11712512172 is 27121521711.

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, 30693 + ... + 156099.

Almost surely, 2^11712512172 is an apocalyptic number.

11712512172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11712512172 is an abundant number, since it is smaller than the sum of its proper divisors (16406971220).

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

11712512172 is a wasteful number, since it uses less digits than its factorization.

11712512172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125638 (or 125636 counting only the distinct ones).

The product of its digits is 1960, while the sum is 30.

The spelling of 11712512172 in words is "eleven billion, seven hundred twelve million, five hundred twelve thousand, one hundred seventy-two".