256703560617 has 16 divisors (see below), whose sum is σ = 391179104640. Its totient is φ = 146683333632.

The previous prime is 256703560591. The next prime is 256703560639. The reversal of 256703560617 is 716065307652.

It is not a de Polignac number, because 256703560617 - 2⁷ = 256703560489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256703560657) 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 15 ways as a sum of consecutive naturals, for example, 610003 + ... + 941015.

It is an arithmetic number, because the mean of its divisors is an integer number (24448694040).

Almost surely, 2^256703560617 is an apocalyptic number.

It is an amenable number.

256703560617 is a deficient number, since it is larger than the sum of its proper divisors (134475544023).

256703560617 is a wasteful number, since it uses less digits than its factorization.

256703560617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367952.

The product of its (nonzero) digits is 1587600, while the sum is 48.

The spelling of 256703560617 in words is "two hundred fifty-six billion, seven hundred three million, five hundred sixty thousand, six hundred seventeen".