256534256271 has 32 divisors (see below), whose sum is σ = 351627494400. Its totient is φ = 166306250880.

The previous prime is 256534256267. The next prime is 256534256309. The reversal of 256534256271 is 172652435652.

It is not a de Polignac number, because 256534256271 - 2² = 256534256267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256534256271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256534256261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6058345 + ... + 6100541.

It is an arithmetic number, because the mean of its divisors is an integer number (10988359200).

Almost surely, 2^256534256271 is an apocalyptic number.

256534256271 is a deficient number, since it is larger than the sum of its proper divisors (95093238129).

256534256271 is a wasteful number, since it uses less digits than its factorization.

256534256271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42639.

The product of its digits is 3024000, while the sum is 48.

The spelling of 256534256271 in words is "two hundred fifty-six billion, five hundred thirty-four million, two hundred fifty-six thousand, two hundred seventy-one".