8251681256 has 32 divisors (see below), whose sum is σ = 19042343040. Its totient is φ = 3264401088.

The previous prime is 8251681241. The next prime is 8251681271. The reversal of 8251681256 is 6521861528.

It is an interprime number because it is at equal distance from previous prime (8251681241) and next prime (8251681271).

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, 5666636 + ... + 5668091.

It is an arithmetic number, because the mean of its divisors is an integer number (595073220).

Almost surely, 2^8251681256 is an apocalyptic number.

It is an amenable number.

8251681256 is an abundant number, since it is smaller than the sum of its proper divisors (10790661784).

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

8251681256 is a wasteful number, since it uses less digits than its factorization.

8251681256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11334753 (or 11334749 counting only the distinct ones).

The product of its digits is 230400, while the sum is 44.

The square root of 8251681256 is about 90838.7651611359. The cubic root of 8251681256 is about 2020.7572607666.

The spelling of 8251681256 in words is "eight billion, two hundred fifty-one million, six hundred eighty-one thousand, two hundred fifty-six".