168243616 has 24 divisors (see below), whose sum is σ = 342653220. Its totient is φ = 81220608.

The previous prime is 168243589. The next prime is 168243617. The reversal of 168243616 is 616342861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 152275600 + 15968016 = 12340^2 + 3996^2 .

It is not an unprimeable number, because it can be changed into a prime (168243617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89721 + ... + 91576.

Almost surely, 2^168243616 is an apocalyptic number.

168243616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

168243616 is an abundant number, since it is smaller than the sum of its proper divisors (174409604).

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

168243616 is a wasteful number, since it uses less digits than its factorization.

168243616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181336 (or 181328 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 168243616 is about 12970.8756836229. The cubic root of 168243616 is about 552.0514199807.

The spelling of 168243616 in words is "one hundred sixty-eight million, two hundred forty-three thousand, six hundred sixteen".