12157639924 has 12 divisors (see below), whose sum is σ = 21406397824. Its totient is φ = 6041526264.

The previous prime is 12157639919. The next prime is 12157639937. The reversal of 12157639924 is 42993675121.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9322692 + ... + 9323995.

Almost surely, 2^12157639924 is an apocalyptic number.

It is an amenable number.

12157639924 is a deficient number, since it is larger than the sum of its proper divisors (9248757900).

12157639924 is a wasteful number, since it uses less digits than its factorization.

12157639924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18646854 (or 18646852 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The spelling of 12157639924 in words is "twelve billion, one hundred fifty-seven million, six hundred thirty-nine thousand, nine hundred twenty-four".