168289640640 has 168 divisors, whose sum is σ = 631468747728. Its totient is φ = 40797480960.

The previous prime is 168289640579. The next prime is 168289640663. The reversal of 168289640640 is 46046982861.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2624407 + ... + 2687766.

It is an arithmetic number, because the mean of its divisors is an integer number (3758742546).

Almost surely, 2^168289640640 is an apocalyptic number.

168289640640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168289640640 is an abundant number, since it is smaller than the sum of its proper divisors (463179107088).

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

168289640640 is a wasteful number, since it uses less digits than its factorization.

168289640640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5312207 (or 5312194 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 54.

The spelling of 168289640640 in words is "one hundred sixty-eight billion, two hundred eighty-nine million, six hundred forty thousand, six hundred forty".