12640379024 has 40 divisors (see below), whose sum is σ = 30142445760. Its totient is φ = 5000588928.

The previous prime is 12640378987. The next prime is 12640379047. The reversal of 12640379024 is 42097304621.

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, 4339334 + ... + 4342245.

It is an arithmetic number, because the mean of its divisors is an integer number (753561144).

Almost surely, 2^12640379024 is an apocalyptic number.

12640379024 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12640379024 is an abundant number, since it is smaller than the sum of its proper divisors (17502066736).

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

12640379024 is a wasteful number, since it uses less digits than its factorization.

12640379024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8681607 (or 8681601 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 12640379024 in words is "twelve billion, six hundred forty million, three hundred seventy-nine thousand, twenty-four".