80569165 has 16 divisors (see below), whose sum is σ = 99636912. Its totient is φ = 62498304.

The previous prime is 80569133. The next prime is 80569183. The reversal of 80569165 is 56196508.

It can be written as a sum of positive squares in 8 ways, for example, as 1394761 + 79174404 = 1181^2 + 8898^2 .

It is a cyclic number.

It is not a de Polignac number, because 80569165 - 2⁵ = 80569133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72897 + ... + 73993.

It is an arithmetic number, because the mean of its divisors is an integer number (6227307).

Almost surely, 2^80569165 is an apocalyptic number.

It is an amenable number.

80569165 is a deficient number, since it is larger than the sum of its proper divisors (19067747).

80569165 is a wasteful number, since it uses less digits than its factorization.

80569165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 80569165 is about 8976.0328096548. The cubic root of 80569165 is about 431.9063815339.

The spelling of 80569165 in words is "eighty million, five hundred sixty-nine thousand, one hundred sixty-five".