2256351436517 has 2 divisors, whose sum is σ = 2256351436518. Its totient is φ = 2256351436516.

The previous prime is 2256351436499. The next prime is 2256351436529. The reversal of 2256351436517 is 7156341536522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2180069968036 + 76281468481 = 1476506^2 + 276191^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256351436517 - 2⁶ = 2256351436453 is a prime.

It is a super-2 number, since 2×2256351436517² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256351436217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128175718258 + 1128175718259.

It is an arithmetic number, because the mean of its divisors is an integer number (1128175718259).

Almost surely, 2^{2256351436517} is an apocalyptic number.

It is an amenable number.

2256351436517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256351436517 is an equidigital number, since it uses as much as digits as its factorization.

2256351436517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536000, while the sum is 50.

The spelling of 2256351436517 in words is "two trillion, two hundred fifty-six billion, three hundred fifty-one million, four hundred thirty-six thousand, five hundred seventeen".