864216265 has 16 divisors (see below), whose sum is σ = 1132030080. Its totient is φ = 628136320.

The previous prime is 864216257. The next prime is 864216271. The reversal of 864216265 is 562612468.

It is not a de Polignac number, because 864216265 - 2³ = 864216257 is a prime.

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, 111021 + ... + 118549.

It is an arithmetic number, because the mean of its divisors is an integer number (70751880).

Almost surely, 2^864216265 is an apocalyptic number.

It is an amenable number.

864216265 is a deficient number, since it is larger than the sum of its proper divisors (267813815).

864216265 is a wasteful number, since it uses less digits than its factorization.

864216265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632.

The product of its digits is 138240, while the sum is 40.

The square root of 864216265 is about 29397.5554255792. Note that the first 3 decimals coincide. The cubic root of 864216265 is about 952.5200919793.

The spelling of 864216265 in words is "eight hundred sixty-four million, two hundred sixteen thousand, two hundred sixty-five".