12640791875 has 20 divisors (see below), whose sum is σ = 16340644320. Its totient is φ = 9763908000.

The previous prime is 12640791869. The next prime is 12640791887. The reversal of 12640791875 is 57819704621.

It is a happy number.

It is not a de Polignac number, because 12640791875 - 2¹² = 12640787779 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 330587 + ... + 366836.

It is an arithmetic number, because the mean of its divisors is an integer number (817032216).

Almost surely, 2^12640791875 is an apocalyptic number.

12640791875 is a deficient number, since it is larger than the sum of its proper divisors (3699852445).

12640791875 is an frugal number, since it uses more digits than its factorization.

12640791875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697472 (or 697457 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The spelling of 12640791875 in words is "twelve billion, six hundred forty million, seven hundred ninety-one thousand, eight hundred seventy-five".