256517270251354 has 16 divisors (see below), whose sum is σ = 439744298659200. Its totient is φ = 109935871264944.

The previous prime is 256517270251279. The next prime is 256517270251357. The reversal of 256517270251354 is 453152072715652.

256517270251354 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×256517270251354² (a number of 30 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 256517270251295 and 256517270251304.

It is not an unprimeable number, because it can be changed into a prime (256517270251357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8351227 + ... + 24140785.

It is an arithmetic number, because the mean of its divisors is an integer number (27484018666200).

Almost surely, 2^{256517270251354} is an apocalyptic number.

256517270251354 is a deficient number, since it is larger than the sum of its proper divisors (183227028407846).

256517270251354 is a wasteful number, since it uses less digits than its factorization.

256517270251354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16949997.

The product of its (nonzero) digits is 17640000, while the sum is 55.

The spelling of 256517270251354 in words is "two hundred fifty-six trillion, five hundred seventeen billion, two hundred seventy million, two hundred fifty-one thousand, three hundred fifty-four".