256278182992 has 80 divisors (see below), whose sum is σ = 549194238208. Its totient is φ = 115104084480.

The previous prime is 256278182921. The next prime is 256278183011. The reversal of 256278182992 is 299281872652.

It is a self number, because there is not a number n which added to its sum of digits gives 256278182992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2370958 + ... + 2476690.

Almost surely, 2^256278182992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256278182992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274597119104).

256278182992 is an abundant number, since it is smaller than the sum of its proper divisors (292916055216).

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

256278182992 is a wasteful number, since it uses less digits than its factorization.

256278182992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106068 (or 106062 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The spelling of 256278182992 in words is "two hundred fifty-six billion, two hundred seventy-eight million, one hundred eighty-two thousand, nine hundred ninety-two".