865711165 has 32 divisors (see below), whose sum is σ = 1163538432. Its totient is φ = 613032000.

The previous prime is 865711159. The next prime is 865711201. The reversal of 865711165 is 561117568.

It is not a de Polignac number, because 865711165 - 2⁹ = 865710653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 322780 + ... + 325450.

It is an arithmetic number, because the mean of its divisors is an integer number (36360576).

Almost surely, 2^865711165 is an apocalyptic number.

It is an amenable number.

865711165 is a deficient number, since it is larger than the sum of its proper divisors (297827267).

865711165 is a wasteful number, since it uses less digits than its factorization.

865711165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2841.

The product of its digits is 50400, while the sum is 40.

The square root of 865711165 is about 29422.9700234358. The cubic root of 865711165 is about 953.0689908716.

The spelling of 865711165 in words is "eight hundred sixty-five million, seven hundred eleven thousand, one hundred sixty-five".