168616722816 has 160 divisors (see below), whose sum is σ = 502050344400. Its totient is φ = 56177611776.

The previous prime is 168616722739. The next prime is 168616722817. The reversal of 168616722816 is 618227616861.

168616722816 is a `hidden beast` number, since 1 + 6 + 8 + 616 + 7 + 2 + 2 + 8 + 16 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168616722817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 38556406 + ... + 38560778.

Almost surely, 2^168616722816 is an apocalyptic number.

168616722816 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 168616722816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251025172200).

168616722816 is an abundant number, since it is smaller than the sum of its proper divisors (333433621584).

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

168616722816 is an equidigital number, since it uses as much as digits as its factorization.

168616722816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8118 (or 8097 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The spelling of 168616722816 in words is "one hundred sixty-eight billion, six hundred sixteen million, seven hundred twenty-two thousand, eight hundred sixteen".