256736571313 has 16 divisors (see below), whose sum is σ = 267334704000. Its totient is φ = 246377589120.

The previous prime is 256736571307. The next prime is 256736571347. The reversal of 256736571313 is 313175637652.

It is a cyclic number.

It is not a de Polignac number, because 256736571313 - 2⁹ = 256736570801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256736571613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 425218 + ... + 833236.

It is an arithmetic number, because the mean of its divisors is an integer number (16708419000).

Almost surely, 2^256736571313 is an apocalyptic number.

It is an amenable number.

256736571313 is a deficient number, since it is larger than the sum of its proper divisors (10598132687).

256736571313 is a wasteful number, since it uses less digits than its factorization.

256736571313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408312.

The product of its digits is 2381400, while the sum is 49.

The spelling of 256736571313 in words is "two hundred fifty-six billion, seven hundred thirty-six million, five hundred seventy-one thousand, three hundred thirteen".