168194199168 has 512 divisors, whose sum is σ = 549918720000. Its totient is φ = 50398433280.

The previous prime is 168194199167. The next prime is 168194199169. The reversal of 168194199168 is 861991491861.

168194199168 is a `hidden beast` number, since 1 + 68 + 19 + 419 + 91 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (168194199167) and next prime (168194199169).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (168194199163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 107885173 + ... + 107886731.

It is an arithmetic number, because the mean of its divisors is an integer number (1074060000).

Almost surely, 2^168194199168 is an apocalyptic number.

168194199168 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 168194199168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274959360000).

168194199168 is an abundant number, since it is smaller than the sum of its proper divisors (381724520832).

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

168194199168 is a wasteful number, since it uses less digits than its factorization.

168194199168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1667 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 63.

The spelling of 168194199168 in words is "one hundred sixty-eight billion, one hundred ninety-four million, one hundred ninety-nine thousand, one hundred sixty-eight".