256256057543160 has 32 divisors (see below), whose sum is σ = 768768172629840. Its totient is φ = 68334948678144.

The previous prime is 256256057543149. The next prime is 256256057543221. The reversal of 256256057543160 is 61345750652652.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 256256057543160.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1067733572977 + ... + 1067733573216.

Almost surely, 2^{256256057543160} is an apocalyptic number.

256256057543160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256256057543160 is an abundant number, since it is smaller than the sum of its proper divisors (512512115086680).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256256057543160 is a wasteful number, since it uses less digits than its factorization.

256256057543160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2135467146207 (or 2135467146203 counting only the distinct ones).

The product of its (nonzero) digits is 45360000, while the sum is 57.

The spelling of 256256057543160 in words is "two hundred fifty-six trillion, two hundred fifty-six billion, fifty-seven million, five hundred forty-three thousand, one hundred sixty".