256869076912 has 80 divisors (see below), whose sum is σ = 578612966400. Its totient is φ = 108185126400.

The previous prime is 256869076901. The next prime is 256869076931. The reversal of 256869076912 is 219670968652.

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, 32302537 + ... + 32310487.

It is an arithmetic number, because the mean of its divisors is an integer number (7232662080).

Almost surely, 2^256869076912 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 256869076912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (289306483200).

256869076912 is an abundant number, since it is smaller than the sum of its proper divisors (321743889488).

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

256869076912 is a wasteful number, since it uses less digits than its factorization.

256869076912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12914 (or 12908 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 61.

The spelling of 256869076912 in words is "two hundred fifty-six billion, eight hundred sixty-nine million, seventy-six thousand, nine hundred twelve".