656201220256 has 12 divisors (see below), whose sum is σ = 1291896152442. Its totient is φ = 328100610112.

The previous prime is 656201220239. The next prime is 656201220341. The reversal of 656201220256 is 652022102656.

It can be written as a sum of positive squares in only one way, i.e., 644648410000 + 11552810256 = 802900^2 + 107484^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10253144035 + ... + 10253144098.

Almost surely, 2^656201220256 is an apocalyptic number.

It is an amenable number.

656201220256 is a deficient number, since it is larger than the sum of its proper divisors (635694932186).

656201220256 is a wasteful number, since it uses less digits than its factorization.

656201220256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20506288143 (or 20506288135 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 656201220256 in words is "six hundred fifty-six billion, two hundred one million, two hundred twenty thousand, two hundred fifty-six".