12656224445213 has 4 divisors (see below), whose sum is σ = 12659445682140. Its totient is φ = 12653003208288.

The previous prime is 12656224445201. The next prime is 12656224445237. The reversal of 12656224445213 is 31254442265621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5825643567769 + 6830580877444 = 2413637^2 + 2613538^2 .

It is a cyclic number.

It is not a de Polignac number, because 12656224445213 - 2²⁸ = 12655956009757 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 (12656224415213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1610612570 + ... + 1610620427.

It is an arithmetic number, because the mean of its divisors is an integer number (3164861420535).

Almost surely, 2^{12656224445213} is an apocalyptic number.

It is an amenable number.

12656224445213 is a deficient number, since it is larger than the sum of its proper divisors (3221236927).

12656224445213 is an equidigital number, since it uses as much as digits as its factorization.

12656224445213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221236926.

The product of its digits is 2764800, while the sum is 47.

The spelling of 12656224445213 in words is "twelve trillion, six hundred fifty-six billion, two hundred twenty-four million, four hundred forty-five thousand, two hundred thirteen".