168361985 has 32 divisors (see below), whose sum is σ = 227221632. Its totient is φ = 118702080.

The previous prime is 168361969. The next prime is 168361997. The reversal of 168361985 is 589163861.

It is not a de Polignac number, because 168361985 - 2⁴ = 168361969 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 607667 + ... + 607943.

It is an arithmetic number, because the mean of its divisors is an integer number (7100676).

It is a Proth number, since it is equal to 2569 ⋅ 2¹⁶ + 1 and 2569 < 2¹⁶.

Almost surely, 2^168361985 is an apocalyptic number.

It is an amenable number.

168361985 is a deficient number, since it is larger than the sum of its proper divisors (58859647).

168361985 is a wasteful number, since it uses less digits than its factorization.

168361985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its digits is 311040, while the sum is 47.

The square root of 168361985 is about 12975.4377575479. The cubic root of 168361985 is about 552.1808562058.

The spelling of 168361985 in words is "one hundred sixty-eight million, three hundred sixty-one thousand, nine hundred eighty-five".