12664175517 has 48 divisors (see below), whose sum is σ = 22189070592. Its totient is φ = 6794565120.

The previous prime is 12664175509. The next prime is 12664175539. The reversal of 12664175517 is 71557146621.

12664175517 is a `hidden beast` number, since 1 + 2 + 6 + 64 + 1 + 75 + 517 = 666.

It is not a de Polignac number, because 12664175517 - 2³ = 12664175509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664125517) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 436848 + ... + 464934.

It is an arithmetic number, because the mean of its divisors is an integer number (462272304).

Almost surely, 2^12664175517 is an apocalyptic number.

12664175517 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

12664175517 is a deficient number, since it is larger than the sum of its proper divisors (9524895075).

12664175517 is a wasteful number, since it uses less digits than its factorization.

12664175517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28538 (or 28535 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The spelling of 12664175517 in words is "twelve billion, six hundred sixty-four million, one hundred seventy-five thousand, five hundred seventeen".