256060007817 has 16 divisors (see below), whose sum is σ = 363075085440. Its totient is φ = 159963501312.

The previous prime is 256060007813. The next prime is 256060007839. The reversal of 256060007817 is 718700060652.

It is not a de Polignac number, because 256060007817 - 2² = 256060007813 is a prime.

It is a super-2 number, since 2×256060007817² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256060007813) 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, 10950733 + ... + 10974090.

It is an arithmetic number, because the mean of its divisors is an integer number (22692192840).

Almost surely, 2^256060007817 is an apocalyptic number.

It is an amenable number.

256060007817 is a deficient number, since it is larger than the sum of its proper divisors (107015077623).

256060007817 is a wasteful number, since it uses less digits than its factorization.

256060007817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21925072.

The product of its (nonzero) digits is 141120, while the sum is 42.

The spelling of 256060007817 in words is "two hundred fifty-six billion, sixty million, seven thousand, eight hundred seventeen".