256675075717 has 4 divisors (see below), whose sum is σ = 256686744160. Its totient is φ = 256663407276.

The previous prime is 256675075687. The next prime is 256675075729. The reversal of 256675075717 is 717570576652.

256675075717 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256675075717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256675075777) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 5801163 + ... + 5845240.

It is an arithmetic number, because the mean of its divisors is an integer number (64171686040).

Almost surely, 2^256675075717 is an apocalyptic number.

It is an amenable number.

256675075717 is a deficient number, since it is larger than the sum of its proper divisors (11668443).

256675075717 is a wasteful number, since it uses less digits than its factorization.

256675075717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11668442.

The product of its (nonzero) digits is 21609000, while the sum is 58.

The spelling of 256675075717 in words is "two hundred fifty-six billion, six hundred seventy-five million, seventy-five thousand, seven hundred seventeen".