80585591 has 4 divisors (see below), whose sum is σ = 80829384. Its totient is φ = 80341800.

The previous prime is 80585587. The next prime is 80585663. The reversal of 80585591 is 19558508.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 80585591 - 2² = 80585587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80585501) 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, 121400 + ... + 122061.

It is an arithmetic number, because the mean of its divisors is an integer number (20207346).

Almost surely, 2^80585591 is an apocalyptic number.

80585591 is a deficient number, since it is larger than the sum of its proper divisors (243793).

80585591 is a wasteful number, since it uses less digits than its factorization.

80585591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243792.

The product of its (nonzero) digits is 72000, while the sum is 41.

The square root of 80585591 is about 8976.9477552228. The cubic root of 80585591 is about 431.9357311084.

The spelling of 80585591 in words is "eighty million, five hundred eighty-five thousand, five hundred ninety-one".