256117093180 has 24 divisors (see below), whose sum is σ = 579218657472. Its totient is φ = 94566311232.

The previous prime is 256117093153. The next prime is 256117093181. The reversal of 256117093180 is 81390711652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256117093181) 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, 492532612 + ... + 492533131.

It is an arithmetic number, because the mean of its divisors is an integer number (24134110728).

Almost surely, 2^256117093180 is an apocalyptic number.

256117093180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256117093180 is an abundant number, since it is smaller than the sum of its proper divisors (323101564292).

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

256117093180 is a wasteful number, since it uses less digits than its factorization.

256117093180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 985065765 (or 985065763 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 256117093180 in words is "two hundred fifty-six billion, one hundred seventeen million, ninety-three thousand, one hundred eighty".