12646043972 has 24 divisors (see below), whose sum is σ = 22179413760. Its totient is φ = 6309087840.

The previous prime is 12646043951. The next prime is 12646043981. The reversal of 12646043972 is 27934064621.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4902179 + ... + 4904757.

It is an arithmetic number, because the mean of its divisors is an integer number (924142240).

Almost surely, 2^12646043972 is an apocalyptic number.

It is an amenable number.

12646043972 is a deficient number, since it is larger than the sum of its proper divisors (9533369788).

12646043972 is a wasteful number, since it uses less digits than its factorization.

12646043972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4811 (or 4809 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 44.

The spelling of 12646043972 in words is "twelve billion, six hundred forty-six million, forty-three thousand, nine hundred seventy-two".