256205336057 has 32 divisors (see below), whose sum is σ = 301185475200. Its totient is φ = 215331635200.

The previous prime is 256205336053. The next prime is 256205336083. The reversal of 256205336057 is 750633502652.

It is not a de Polignac number, because 256205336057 - 2² = 256205336053 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 256205335999 and 256205336017.

It is not an unprimeable number, because it can be changed into a prime (256205336053) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 15537257 + ... + 15553737.

It is an arithmetic number, because the mean of its divisors is an integer number (9412046100).

Almost surely, 2^256205336057 is an apocalyptic number.

It is an amenable number.

256205336057 is a deficient number, since it is larger than the sum of its proper divisors (44980139143).

256205336057 is a wasteful number, since it uses less digits than its factorization.

256205336057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17977.

The product of its (nonzero) digits is 1134000, while the sum is 44.

The spelling of 256205336057 in words is "two hundred fifty-six billion, two hundred five million, three hundred thirty-six thousand, fifty-seven".