168993564 has 24 divisors (see below), whose sum is σ = 400205568. Its totient is φ = 55490160.

The previous prime is 168993557. The next prime is 168993571. The reversal of 168993564 is 465399861.

It is an interprime number because it is at equal distance from previous prime (168993557) and next prime (168993571).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104292 + ... + 105899.

It is an arithmetic number, because the mean of its divisors is an integer number (16675232).

Almost surely, 2^168993564 is an apocalyptic number.

It is an amenable number.

168993564 is an abundant number, since it is smaller than the sum of its proper divisors (231212004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

168993564 is a wasteful number, since it uses less digits than its factorization.

168993564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210265 (or 210263 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 168993564 is about 12999.7524591817. The cubic root of 168993564 is about 552.8704628972.

The spelling of 168993564 in words is "one hundred sixty-eight million, nine hundred ninety-three thousand, five hundred sixty-four".