12977812136 has 32 divisors (see below), whose sum is σ = 25619652000. Its totient is φ = 6146053056.

The previous prime is 12977812129. The next prime is 12977812153. The reversal of 12977812136 is 63121877921.

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, 1342970 + ... + 1352598.

It is an arithmetic number, because the mean of its divisors is an integer number (800614125).

Almost surely, 2^12977812136 is an apocalyptic number.

It is an amenable number.

12977812136 is a deficient number, since it is larger than the sum of its proper divisors (12641839864).

12977812136 is a wasteful number, since it uses less digits than its factorization.

12977812136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18521 (or 18517 counting only the distinct ones).

The product of its digits is 254016, while the sum is 47.

The spelling of 12977812136 in words is "twelve billion, nine hundred seventy-seven million, eight hundred twelve thousand, one hundred thirty-six".