168317785194 has 192 divisors, whose sum is σ = 391960912896. Its totient is φ = 48072960000.

The previous prime is 168317785193. The next prime is 168317785243. The reversal of 168317785194 is 491587713861.

It is a super-2 number, since 2×168317785194² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (168317785193) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 78615364 + ... + 78617504.

It is an arithmetic number, because the mean of its divisors is an integer number (2041463088).

Almost surely, 2^168317785194 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168317785194, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195980456448).

168317785194 is an abundant number, since it is smaller than the sum of its proper divisors (223643127702).

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

168317785194 is a wasteful number, since it uses less digits than its factorization.

168317785194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305 (or 2292 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 60.

The spelling of 168317785194 in words is "one hundred sixty-eight billion, three hundred seventeen million, seven hundred eighty-five thousand, one hundred ninety-four".