12664351649975 has 24 divisors (see below), whose sum is σ = 16153300289280. Its totient is φ = 9844580221920.

The previous prime is 12664351649933. The next prime is 12664351649981. The reversal of 12664351649975 is 57994615346621.

12664351649975 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-12664351649975 is a prime.

It is a Smith number, since the sum of its digits (68) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38607077 + ... + 38933726.

It is an arithmetic number, because the mean of its divisors is an integer number (673054178720).

Almost surely, 2^{12664351649975} is an apocalyptic number.

12664351649975 is a deficient number, since it is larger than the sum of its proper divisors (3488948639305).

12664351649975 is a wasteful number, since it uses less digits than its factorization.

12664351649975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77540999 (or 77540994 counting only the distinct ones).

The product of its digits is 293932800, while the sum is 68.

The spelling of 12664351649975 in words is "twelve trillion, six hundred sixty-four billion, three hundred fifty-one million, six hundred forty-nine thousand, nine hundred seventy-five".