12977645499 has 128 divisors (see below), whose sum is σ = 24764866560. Its totient is φ = 6533913600.

The previous prime is 12977645497. The next prime is 12977645509. The reversal of 12977645499 is 99454677921.

12977645499 is a `hidden beast` number, since 1 + 2 + 97 + 7 + 6 + 454 + 99 = 666.

It is not a de Polignac number, because 12977645499 - 2¹ = 12977645497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (12977645497) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4733269 + ... + 4736009.

It is an arithmetic number, because the mean of its divisors is an integer number (193475520).

Almost surely, 2^12977645499 is an apocalyptic number.

12977645499 is a deficient number, since it is larger than the sum of its proper divisors (11787221061).

12977645499 is a wasteful number, since it uses less digits than its factorization.

12977645499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858 (or 2852 counting only the distinct ones).

The product of its digits is 34292160, while the sum is 63.

The spelling of 12977645499 in words is "twelve billion, nine hundred seventy-seven million, six hundred forty-five thousand, four hundred ninety-nine".