168609168 has 160 divisors (see below), whose sum is σ = 595795200. Its totient is φ = 44457984.

The previous prime is 168609151. The next prime is 168609169. The reversal of 168609168 is 861906861.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168609169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37168 + ... + 41456.

It is an arithmetic number, because the mean of its divisors is an integer number (3723720).

Almost surely, 2^168609168 is an apocalyptic number.

168609168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168609168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297897600).

168609168 is an abundant number, since it is smaller than the sum of its proper divisors (427186032).

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

168609168 is a wasteful number, since it uses less digits than its factorization.

168609168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4326 (or 4314 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 168609168 is about 12984.9592991276. The cubic root of 168609168 is about 552.4509547450.

The spelling of 168609168 in words is "one hundred sixty-eight million, six hundred nine thousand, one hundred sixty-eight".