12157567746 has 32 divisors (see below), whose sum is σ = 26247231360. Its totient is φ = 3742658304.

The previous prime is 12157567703. The next prime is 12157567757. The reversal of 12157567746 is 64776575121.

It is a happy number.

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, 1514935 + ... + 1522938.

It is an arithmetic number, because the mean of its divisors is an integer number (820225980).

Almost surely, 2^12157567746 is an apocalyptic number.

12157567746 is an abundant number, since it is smaller than the sum of its proper divisors (14089663614).

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

12157567746 is a wasteful number, since it uses less digits than its factorization.

12157567746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3037930.

The product of its digits is 2469600, while the sum is 51.

The spelling of 12157567746 in words is "twelve billion, one hundred fifty-seven million, five hundred sixty-seven thousand, seven hundred forty-six".