80945856 has 84 divisors (see below), whose sum is σ = 234772200. Its totient is φ = 26661888.

The previous prime is 80945819. The next prime is 80945897. The reversal of 80945856 is 65854908.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50475 + ... + 52053.

Almost surely, 2^80945856 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 80945856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117386100).

80945856 is an abundant number, since it is smaller than the sum of its proper divisors (153826344).

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

80945856 is a wasteful number, since it uses less digits than its factorization.

80945856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1686 (or 1673 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 45.

The square root of 80945856 is about 8996.9914971617. The cubic root of 80945856 is about 432.5784432322.

It can be divided in two parts, 809 and 45856, that added together give a triangular number (46665 = T₃₀₅).

The spelling of 80945856 in words is "eighty million, nine hundred forty-five thousand, eight hundred fifty-six".