168191616 has 128 divisors (see below), whose sum is σ = 470016000. Its totient is φ = 53222400.

The previous prime is 168191581. The next prime is 168191623. The reversal of 168191616 is 616191861.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 845085 + ... + 845283.

It is an arithmetic number, because the mean of its divisors is an integer number (3672000).

Almost surely, 2^168191616 is an apocalyptic number.

168191616 is a gapful number since it is divisible by the number (16) 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 168191616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235008000).

168191616 is an abundant number, since it is smaller than the sum of its proper divisors (301824384).

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

168191616 is a wasteful number, since it uses less digits than its factorization.

168191616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318 (or 306 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 168191616 is about 12968.8710379894. The cubic root of 168191616 is about 551.9945389084.

The spelling of 168191616 in words is "one hundred sixty-eight million, one hundred ninety-one thousand, six hundred sixteen".