12640575879 has 16 divisors (see below), whose sum is σ = 19828355040. Its totient is φ = 7931341440.

The previous prime is 12640575877. The next prime is 12640575901. The reversal of 12640575879 is 97857504621.

12640575879 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 0 + 57 + 587 + 9 = 666.

It is not a de Polignac number, because 12640575879 - 2¹ = 12640575877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640575877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13769232 + ... + 13770149.

It is an arithmetic number, because the mean of its divisors is an integer number (1239272190).

Almost surely, 2^12640575879 is an apocalyptic number.

12640575879 is a deficient number, since it is larger than the sum of its proper divisors (7187779161).

12640575879 is a wasteful number, since it uses less digits than its factorization.

12640575879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27539407 (or 27539401 counting only the distinct ones).

The product of its (nonzero) digits is 4233600, while the sum is 54.

The spelling of 12640575879 in words is "twelve billion, six hundred forty million, five hundred seventy-five thousand, eight hundred seventy-nine".