805168065 has 32 divisors (see below), whose sum is σ = 1389185280. Its totient is φ = 395870976.

The previous prime is 805168057. The next prime is 805168069. The reversal of 805168065 is 560861508.

It is not a de Polignac number, because 805168065 - 2³ = 805168057 is a prime.

It is a super-2 number, since 2×805168065² = 1296591225791688450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (805168069) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 176959 + ... + 181451.

It is an arithmetic number, because the mean of its divisors is an integer number (43412040).

Almost surely, 2^805168065 is an apocalyptic number.

It is an amenable number.

805168065 is a deficient number, since it is larger than the sum of its proper divisors (584017215).

805168065 is a wasteful number, since it uses less digits than its factorization.

805168065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5433.

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 805168065 is about 28375.4835201094. The cubic root of 805168065 is about 930.3124802648.

The spelling of 805168065 in words is "eight hundred five million, one hundred sixty-eight thousand, sixty-five".