80559891 has 12 divisors (see below), whose sum is σ = 117254280. Its totient is φ = 53295840.

The previous prime is 80559887. The next prime is 80559893. The reversal of 80559891 is 19895508.

80559891 is a `hidden beast` number, since 8 + 0 + 559 + 8 + 91 = 666.

It is not a de Polignac number, because 80559891 - 2² = 80559887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (80559893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32986 + ... + 35343.

It is an arithmetic number, because the mean of its divisors is an integer number (9771190).

Almost surely, 2^80559891 is an apocalyptic number.

80559891 is a deficient number, since it is larger than the sum of its proper divisors (36694389).

80559891 is a wasteful number, since it uses less digits than its factorization.

80559891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68466 (or 68463 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 45.

The square root of 80559891 is about 8975.5161968546. The cubic root of 80559891 is about 431.8898092158.

The spelling of 80559891 in words is "eighty million, five hundred fifty-nine thousand, eight hundred ninety-one".