656213643464 has 16 divisors (see below), whose sum is σ = 1245975273600. Its totient is φ = 323953570512.

The previous prime is 656213643443. The next prime is 656213643467. The reversal of 656213643464 is 464346312656.

It is not an unprimeable number, because it can be changed into a prime (656213643467) 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, 519155732 + ... + 519156995.

It is an arithmetic number, because the mean of its divisors is an integer number (77873454600).

Almost surely, 2^656213643464 is an apocalyptic number.

It is an amenable number.

656213643464 is a deficient number, since it is larger than the sum of its proper divisors (589761630136).

656213643464 is a wasteful number, since it uses less digits than its factorization.

656213643464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038312812 (or 1038312808 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 50.

The spelling of 656213643464 in words is "six hundred fifty-six billion, two hundred thirteen million, six hundred forty-three thousand, four hundred sixty-four".