80365581 has 16 divisors (see below), whose sum is σ = 121830720. Its totient is φ = 52330320.

The previous prime is 80365561. The next prime is 80365589. The reversal of 80365581 is 18556308.

It is not a de Polignac number, because 80365581 - 2²³ = 71976973 is a prime.

It is a super-2 number, since 2×80365581² = 12917253218935122, which contains 22 as substring.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80365589) 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, 33450 + ... + 35771.

It is an arithmetic number, because the mean of its divisors is an integer number (7614420).

Almost surely, 2^80365581 is an apocalyptic number.

It is an amenable number.

80365581 is a deficient number, since it is larger than the sum of its proper divisors (41465139).

80365581 is a wasteful number, since it uses less digits than its factorization.

80365581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69273 (or 69267 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 80365581 is about 8964.6852147747. The cubic root of 80365581 is about 431.5422910722.

The spelling of 80365581 in words is "eighty million, three hundred sixty-five thousand, five hundred eighty-one".