12656331644 has 24 divisors (see below), whose sum is σ = 24676178688. Its totient is φ = 5630475440.

The previous prime is 12656331631. The next prime is 12656331719. The reversal of 12656331644 is 44613365621.

12656331644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3057974 + ... + 3062109.

It is an arithmetic number, because the mean of its divisors is an integer number (1028174112).

Almost surely, 2^12656331644 is an apocalyptic number.

It is an amenable number.

12656331644 is a deficient number, since it is larger than the sum of its proper divisors (12019847044).

12656331644 is a wasteful number, since it uses less digits than its factorization.

12656331644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6120145 (or 6120143 counting only the distinct ones).

The product of its digits is 311040, while the sum is 41.

The spelling of 12656331644 in words is "twelve billion, six hundred fifty-six million, three hundred thirty-one thousand, six hundred forty-four".