12979609140 has 48 divisors (see below), whose sum is σ = 38480726592. Its totient is φ = 3257627136.

The previous prime is 12979609133. The next prime is 12979609171. The reversal of 12979609140 is 4190697921.

It is a self number, because there is not a number n which added to its sum of digits gives 12979609140.

It is a congruent 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, 6361534 + ... + 6363573.

It is an arithmetic number, because the mean of its divisors is an integer number (801681804).

Almost surely, 2^12979609140 is an apocalyptic number.

12979609140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12979609140 is an abundant number, since it is smaller than the sum of its proper divisors (25501117452).

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

12979609140 is a wasteful number, since it uses less digits than its factorization.

12979609140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12725136 (or 12725134 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The spelling of 12979609140 in words is "twelve billion, nine hundred seventy-nine million, six hundred nine thousand, one hundred forty".