256507172260454 has 8 divisors (see below), whose sum is σ = 384762470535360. Its totient is φ = 128253015415336.

The previous prime is 256507172260453. The next prime is 256507172260483. The reversal of 256507172260454 is 454062271705652.

256507172260454 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×256507172260454² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 256507172260454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256507172260453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284795414 + ... + 285694665.

It is an arithmetic number, because the mean of its divisors is an integer number (48095308816920).

Almost surely, 2^{256507172260454} is an apocalyptic number.

256507172260454 is a deficient number, since it is larger than the sum of its proper divisors (128255298274906).

256507172260454 is a wasteful number, since it uses less digits than its factorization.

256507172260454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 570714894.

The product of its (nonzero) digits is 28224000, while the sum is 56.

The spelling of 256507172260454 in words is "two hundred fifty-six trillion, five hundred seven billion, one hundred seventy-two million, two hundred sixty thousand, four hundred fifty-four".