12656341354663 has 4 divisors (see below), whose sum is σ = 12656349659448. Its totient is φ = 12656333049880.

The previous prime is 12656341354649. The next prime is 12656341354721. The reversal of 12656341354663 is 36645314365621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12656341354663 - 2³³ = 12647751420071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12656341354603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1136053 + ... + 5157838.

It is an arithmetic number, because the mean of its divisors is an integer number (3164087414862).

Almost surely, 2^{12656341354663} is an apocalyptic number.

12656341354663 is a deficient number, since it is larger than the sum of its proper divisors (8304785).

12656341354663 is an equidigital number, since it uses as much as digits as its factorization.

12656341354663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304784.

The product of its digits is 27993600, while the sum is 55.

The spelling of 12656341354663 in words is "twelve trillion, six hundred fifty-six billion, three hundred forty-one million, three hundred fifty-four thousand, six hundred sixty-three".