168965565 has 16 divisors (see below), whose sum is σ = 270852288. Its totient is φ = 89945856.

The previous prime is 168965549. The next prime is 168965603. The reversal of 168965565 is 565569861.

It is a happy number.

168965565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 168965565 - 2⁴ = 168965549 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2092 + ... + 18501.

It is an arithmetic number, because the mean of its divisors is an integer number (16928268).

Almost surely, 2^168965565 is an apocalyptic number.

168965565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

168965565 is a deficient number, since it is larger than the sum of its proper divisors (101886723).

168965565 is a wasteful number, since it uses less digits than its factorization.

168965565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21148.

The product of its digits is 1944000, while the sum is 51.

The square root of 168965565 is about 12998.6755094510. The cubic root of 168965565 is about 552.8399278585.

The spelling of 168965565 in words is "one hundred sixty-eight million, nine hundred sixty-five thousand, five hundred sixty-five".