656475893824 has 21 divisors (see below), whose sum is σ = 1302707214367. Its totient is φ = 328234705984.

The previous prime is 656475893819. The next prime is 656475893831. The reversal of 656475893824 is 428398574656.

The square root of 656475893824 is 810232.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 656475893824.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6431217 + ... + 6532495.

Almost surely, 2^656475893824 is an apocalyptic number.

656475893824 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

656475893824 is the 810232-nd square number.

It is an amenable number.

656475893824 is a deficient number, since it is larger than the sum of its proper divisors (646231320543).

656475893824 is an frugal number, since it uses more digits than its factorization.

656475893824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202570 (or 101281 counting only the distinct ones).

The product of its digits is 348364800, while the sum is 67.

The spelling of 656475893824 in words is "six hundred fifty-six billion, four hundred seventy-five million, eight hundred ninety-three thousand, eight hundred twenty-four".