80689556 has 12 divisors (see below), whose sum is σ = 142527168. Its totient is φ = 39967512.

The previous prime is 80689549. The next prime is 80689597. The reversal of 80689556 is 65598608.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 80689556.

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, 93836 + ... + 94691.

It is an arithmetic number, because the mean of its divisors is an integer number (11877264).

Almost surely, 2^80689556 is an apocalyptic number.

It is an amenable number.

80689556 is a deficient number, since it is larger than the sum of its proper divisors (61837612).

80689556 is a wasteful number, since it uses less digits than its factorization.

80689556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188638 (or 188636 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 47.

The square root of 80689556 is about 8982.7365540797. The cubic root of 80689556 is about 432.1214007801.

The spelling of 80689556 in words is "eighty million, six hundred eighty-nine thousand, five hundred fifty-six".