168980165 has 16 divisors (see below), whose sum is σ = 207140976. Its totient is φ = 132288000.

The previous prime is 168980159. The next prime is 168980173. The reversal of 168980165 is 561089861.

It can be written as a sum of positive squares in 8 ways, for example, as 15864289 + 153115876 = 3983^2 + 12374^2 .

It is not a de Polignac number, because 168980165 - 2¹⁸ = 168718021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158735 + ... + 159795.

It is an arithmetic number, because the mean of its divisors is an integer number (12946311).

Almost surely, 2^168980165 is an apocalyptic number.

It is an amenable number.

168980165 is a deficient number, since it is larger than the sum of its proper divisors (38160811).

168980165 is a wasteful number, since it uses less digits than its factorization.

168980165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720.

The product of its (nonzero) digits is 103680, while the sum is 44.

The square root of 168980165 is about 12999.2370929990. The cubic root of 168980165 is about 552.8558506896.

The spelling of 168980165 in words is "one hundred sixty-eight million, nine hundred eighty thousand, one hundred sixty-five".