12647364665 has 16 divisors (see below), whose sum is σ = 16461883200. Its totient is φ = 9272394432.

The previous prime is 12647364661. The next prime is 12647364673. The reversal of 12647364665 is 56646374621.

It is a cyclic number.

It is not a de Polignac number, because 12647364665 - 2² = 12647364661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12647364661) 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, 690875 + ... + 708944.

It is an arithmetic number, because the mean of its divisors is an integer number (1028867700).

Almost surely, 2^12647364665 is an apocalyptic number.

It is an amenable number.

12647364665 is a deficient number, since it is larger than the sum of its proper divisors (3814518535).

12647364665 is a wasteful number, since it uses less digits than its factorization.

12647364665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1399976.

The product of its digits is 4354560, while the sum is 50.

The spelling of 12647364665 in words is "twelve billion, six hundred forty-seven million, three hundred sixty-four thousand, six hundred sixty-five".