85844565 has 24 divisors (see below), whose sum is σ = 156630240. Its totient is φ = 43373664.

The previous prime is 85844537. The next prime is 85844567. The reversal of 85844565 is 56544858.

85844565 is a `hidden beast` number, since 8 + 5 + 84 + 4 + 565 = 666.

It is not a de Polignac number, because 85844565 - 2²⁰ = 84795989 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 85844565.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85844567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49347 + ... + 51056.

It is an arithmetic number, because the mean of its divisors is an integer number (6526260).

Almost surely, 2^85844565 is an apocalyptic number.

It is an amenable number.

85844565 is a deficient number, since it is larger than the sum of its proper divisors (70785675).

85844565 is a wasteful number, since it uses less digits than its factorization.

85844565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100433 (or 100430 counting only the distinct ones).

The product of its digits is 768000, while the sum is 45.

The square root of 85844565 is about 9265.2342118265. The cubic root of 85844565 is about 441.1344091822.

The spelling of 85844565 in words is "eighty-five million, eight hundred forty-four thousand, five hundred sixty-five".