168351668500 has 24 divisors (see below), whose sum is σ = 367680045096. Its totient is φ = 67340667200.

The previous prime is 168351668477. The next prime is 168351668519. The reversal of 168351668500 is 5866153861.

It can be written as a sum of positive squares in 4 ways, for example, as 40792688784 + 127558979716 = 201972^2 + 357154^2 .

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, 168351169 + ... + 168352168.

It is an arithmetic number, because the mean of its divisors is an integer number (15320001879).

Almost surely, 2^168351668500 is an apocalyptic number.

168351668500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168351668500 is an abundant number, since it is smaller than the sum of its proper divisors (199328376596).

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

168351668500 is a wasteful number, since it uses less digits than its factorization.

168351668500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336703356 (or 336703344 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 49.

The spelling of 168351668500 in words is "one hundred sixty-eight billion, three hundred fifty-one million, six hundred sixty-eight thousand, five hundred".