256582726628 has 12 divisors (see below), whose sum is σ = 449113020972. Its totient is φ = 128264720640.

The previous prime is 256582726601. The next prime is 256582726643. The reversal of 256582726628 is 826627285652.

It can be written as a sum of positive squares in 2 ways, for example, as 120998231104 + 135584495524 = 347848^2 + 368218^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6638993 + ... + 6677528.

It is an arithmetic number, because the mean of its divisors is an integer number (37426085081).

Almost surely, 2^256582726628 is an apocalyptic number.

It is an amenable number.

256582726628 is a deficient number, since it is larger than the sum of its proper divisors (192530294344).

256582726628 is a wasteful number, since it uses less digits than its factorization.

256582726628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13321342 (or 13321340 counting only the distinct ones).

The product of its digits is 38707200, while the sum is 59.

The spelling of 256582726628 in words is "two hundred fifty-six billion, five hundred eighty-two million, seven hundred twenty-six thousand, six hundred twenty-eight".