80656856 has 16 divisors (see below), whose sum is σ = 172836240. Its totient is φ = 34567200.

The previous prime is 80656847. The next prime is 80656861. The reversal of 80656856 is 65865608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720095 + ... + 720206.

It is an arithmetic number, because the mean of its divisors is an integer number (10802265).

Almost surely, 2^80656856 is an apocalyptic number.

It is an amenable number.

80656856 is an abundant number, since it is smaller than the sum of its proper divisors (92179384).

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

80656856 is a wasteful number, since it uses less digits than its factorization.

80656856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440314 (or 1440310 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 44.

The square root of 80656856 is about 8980.9162116123. The cubic root of 80656856 is about 432.0630194986.

The spelling of 80656856 in words is "eighty million, six hundred fifty-six thousand, eight hundred fifty-six".