80881616 has 20 divisors (see below), whose sum is σ = 163522272. Its totient is φ = 38682336.

The previous prime is 80881589. The next prime is 80881679. The reversal of 80881616 is 61618808.

It is a self number, because there is not a number n which added to its sum of digits gives 80881616.

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, 109526 + ... + 110261.

Almost surely, 2^80881616 is an apocalyptic number.

It is an amenable number.

80881616 is an abundant number, since it is smaller than the sum of its proper divisors (82640656).

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

80881616 is a wasteful number, since it uses less digits than its factorization.

80881616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219818 (or 219812 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 80881616 is about 8993.4207062719. The cubic root of 80881616 is about 432.4639790910.

The spelling of 80881616 in words is "eighty million, eight hundred eighty-one thousand, six hundred sixteen".