82568161 has 12 divisors (see below), whose sum is σ = 90135552. Its totient is φ = 75596976.

The previous prime is 82568153. The next prime is 82568173. The reversal of 82568161 is 16186528.

It is not a de Polignac number, because 82568161 - 2³ = 82568153 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 82568161.

It is not an unprimeable number, because it can be changed into a prime (82568111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19540 + ... + 23386.

It is an arithmetic number, because the mean of its divisors is an integer number (7511296).

Almost surely, 2^82568161 is an apocalyptic number.

It is an amenable number.

82568161 is a deficient number, since it is larger than the sum of its proper divisors (7567391).

82568161 is a wasteful number, since it uses less digits than its factorization.

82568161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4000 (or 3987 counting only the distinct ones).

The product of its digits is 23040, while the sum is 37.

The square root of 82568161 is about 9086.7024271735. The cubic root of 82568161 is about 435.4492403897.

It can be divided in two parts, 825 and 68161, that added together give a palindrome (68986).

The spelling of 82568161 in words is "eighty-two million, five hundred sixty-eight thousand, one hundred sixty-one".