80565 has 16 divisors (see below), whose sum is σ = 133056. Its totient is φ = 41600.

The previous prime is 80557. The next prime is 80567. The reversal of 80565 is 56508.

It is not a de Polignac number, because 80565 - 2³ = 80557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550 + ... + 680.

It is an arithmetic number, because the mean of its divisors is an integer number (8316).

2⁸⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

80565 is a deficient number, since it is larger than the sum of its proper divisors (52491).

80565 is a wasteful number, since it uses less digits than its factorization.

80565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 80565 is about 283.8397435174. The cubic root of 80565 is about 43.1898938980.

It can be divided in two parts, 805 and 65, that multiplied together give a palindrome (52325).

The spelling of 80565 in words is "eighty thousand, five hundred sixty-five".