256188704426 has 16 divisors (see below), whose sum is σ = 397553409288. Its totient is φ = 123732768000.

The previous prime is 256188704407. The next prime is 256188704449. The reversal of 256188704426 is 624407881652.

256188704426 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 222690553801 + 33498150625 = 471901^2 + 183025^2 .

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 15458315 + ... + 15474878.

Almost surely, 2^256188704426 is an apocalyptic number.

256188704426 is a deficient number, since it is larger than the sum of its proper divisors (141364704862).

256188704426 is a wasteful number, since it uses less digits than its factorization.

256188704426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30933337.

The product of its (nonzero) digits is 5160960, while the sum is 53.

The spelling of 256188704426 in words is "two hundred fifty-six billion, one hundred eighty-eight million, seven hundred four thousand, four hundred twenty-six".