68288165 has 24 divisors (see below), whose sum is σ = 92303064. Its totient is φ = 48435200.

The previous prime is 68288161. The next prime is 68288177. The reversal of 68288165 is 56188286.

It can be written as a sum of positive squares in 4 ways, for example, as 5909761 + 62378404 = 2431^2 + 7898^2 .

It is not a de Polignac number, because 68288165 - 2² = 68288161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68288161) 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, 23429 + ... + 26181.

It is an arithmetic number, because the mean of its divisors is an integer number (3845961).

Almost surely, 2^68288165 is an apocalyptic number.

It is an amenable number.

68288165 is a deficient number, since it is larger than the sum of its proper divisors (24014899).

68288165 is a wasteful number, since it uses less digits than its factorization.

68288165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2821 (or 2810 counting only the distinct ones).

The product of its digits is 184320, while the sum is 44.

The square root of 68288165 is about 8263.6653489841. The cubic root of 68288165 is about 408.7412614603.

The spelling of 68288165 in words is "sixty-eight million, two hundred eighty-eight thousand, one hundred sixty-five".