80518589 has 4 divisors (see below), whose sum is σ = 80545920. Its totient is φ = 80491260.

The previous prime is 80518573. The next prime is 80518591. The reversal of 80518589 is 98581508.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 80518589 - 2⁴ = 80518573 is a prime.

It is a super-4 number, since 4×80518589⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80511589) 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, 8627 + ... + 15344.

It is an arithmetic number, because the mean of its divisors is an integer number (20136480).

Almost surely, 2^80518589 is an apocalyptic number.

It is an amenable number.

80518589 is a deficient number, since it is larger than the sum of its proper divisors (27331).

80518589 is a wasteful number, since it uses less digits than its factorization.

80518589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27330.

The product of its (nonzero) digits is 115200, while the sum is 44.

The square root of 80518589 is about 8973.2150871357. The cubic root of 80518589 is about 431.8159885177.

The spelling of 80518589 in words is "eighty million, five hundred eighteen thousand, five hundred eighty-nine".