80561172 has 12 divisors (see below), whose sum is σ = 187976096. Its totient is φ = 26853720.

The previous prime is 80561167. The next prime is 80561179. The reversal of 80561172 is 27116508.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80561179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3356704 + ... + 3356727.

Almost surely, 2^80561172 is an apocalyptic number.

It is an amenable number.

80561172 is an abundant number, since it is smaller than the sum of its proper divisors (107414924).

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

80561172 is a wasteful number, since it uses less digits than its factorization.

80561172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6713438 (or 6713436 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 80561172 is about 8975.5875573692. The cubic root of 80561172 is about 431.8920983944.

The spelling of 80561172 in words is "eighty million, five hundred sixty-one thousand, one hundred seventy-two".