168081216 has 56 divisors (see below), whose sum is σ = 460065120. Its totient is φ = 54093312.

The previous prime is 168081209. The next prime is 168081223. The reversal of 168081216 is 612180861.

It is an interprime number because it is at equal distance from previous prime (168081209) and next prime (168081223).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9526 + ... + 20661.

Almost surely, 2^168081216 is an apocalyptic number.

168081216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

168081216 is an abundant number, since it is smaller than the sum of its proper divisors (291983904).

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

168081216 is a wasteful number, since it uses less digits than its factorization.

168081216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30231 (or 30221 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 168081216 is about 12964.6139934824. The cubic root of 168081216 is about 551.8737371367.

The spelling of 168081216 in words is "one hundred sixty-eight million, eighty-one thousand, two hundred sixteen".