856005165 has 48 divisors (see below), whose sum is σ = 1629246528. Its totient is φ = 429670656.

The previous prime is 856005133. The next prime is 856005167. The reversal of 856005165 is 561500658.

856005165 is a `hidden beast` number, since 85 + 60 + 0 + 516 + 5 = 666.

It is not a de Polignac number, because 856005165 - 2⁵ = 856005133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856005167) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 67 + ... + 41376.

It is an arithmetic number, because the mean of its divisors is an integer number (33942636).

Almost surely, 2^856005165 is an apocalyptic number.

856005165 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

856005165 is a deficient number, since it is larger than the sum of its proper divisors (773241363).

856005165 is a wasteful number, since it uses less digits than its factorization.

856005165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41480 (or 41468 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 856005165 is about 29257.5659445553. The cubic root of 856005165 is about 949.4937894071.

The spelling of 856005165 in words is "eight hundred fifty-six million, five thousand, one hundred sixty-five".