256582726617 has 8 divisors (see below), whose sum is σ = 390983202496. Its totient is φ = 146618700912.

The previous prime is 256582726601. The next prime is 256582726643. The reversal of 256582726617 is 716627285652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 256582726617 - 2⁴ = 256582726601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256582726657) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6109112518 + ... + 6109112559.

It is an arithmetic number, because the mean of its divisors is an integer number (48872900312).

Almost surely, 2^256582726617 is an apocalyptic number.

It is an amenable number.

256582726617 is a deficient number, since it is larger than the sum of its proper divisors (134400475879).

256582726617 is a wasteful number, since it uses less digits than its factorization.

256582726617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12218225087.

The product of its digits is 16934400, while the sum is 57.

The spelling of 256582726617 in words is "two hundred fifty-six billion, five hundred eighty-two million, seven hundred twenty-six thousand, six hundred seventeen".