256630424173271 has 2 divisors, whose sum is σ = 256630424173272. Its totient is φ = 256630424173270.

The previous prime is 256630424173247. The next prime is 256630424173301. The reversal of 256630424173271 is 172371424036652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256630424173271 - 2²⁶ = 256630357064407 is a prime.

It is a super-2 number, since 2×256630424173271² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256630424173241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128315212086635 + 128315212086636.

It is an arithmetic number, because the mean of its divisors is an integer number (128315212086636).

Almost surely, 2^{256630424173271} is an apocalyptic number.

256630424173271 is a deficient number, since it is larger than the sum of its proper divisors (1).

256630424173271 is an equidigital number, since it uses as much as digits as its factorization.

256630424173271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 256630424173271 in words is "two hundred fifty-six trillion, six hundred thirty billion, four hundred twenty-four million, one hundred seventy-three thousand, two hundred seventy-one".