85180865 has 24 divisors (see below), whose sum is σ = 129719232. Its totient is φ = 53098080.

The previous prime is 85180847. The next prime is 85180867. The reversal of 85180865 is 56808158.

It is not a de Polignac number, because 85180865 - 2⁸ = 85180609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85180867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13109 + ... + 18498.

It is an arithmetic number, because the mean of its divisors is an integer number (5404968).

Almost surely, 2^85180865 is an apocalyptic number.

It is an amenable number.

85180865 is a deficient number, since it is larger than the sum of its proper divisors (44538367).

85180865 is a wasteful number, since it uses less digits than its factorization.

85180865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31637 (or 31630 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The square root of 85180865 is about 9229.3480268110. The cubic root of 85180865 is about 439.9946022065.

The spelling of 85180865 in words is "eighty-five million, one hundred eighty thousand, eight hundred sixty-five".