168885985 has 16 divisors (see below), whose sum is σ = 209640960. Its totient is φ = 130475520.

The previous prime is 168885971. The next prime is 168885991. The reversal of 168885985 is 589588861.

168885985 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 168885985 - 2⁵ = 168885953 is a prime.

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, 103506 + ... + 105124.

It is an arithmetic number, because the mean of its divisors is an integer number (13102560).

Almost surely, 2^168885985 is an apocalyptic number.

It is an amenable number.

168885985 is a deficient number, since it is larger than the sum of its proper divisors (40754975).

168885985 is a wasteful number, since it uses less digits than its factorization.

With its successor (168885986) it forms an eRAP, since the sums of their prime factors are consecutive (2328 and 2329).

168885985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328.

The product of its digits is 5529600, while the sum is 58.

The square root of 168885985 is about 12995.6140678307. The cubic root of 168885985 is about 552.7531213934.

The spelling of 168885985 in words is "one hundred sixty-eight million, eight hundred eighty-five thousand, nine hundred eighty-five".