168323791500 has 576 divisors, whose sum is σ = 587264670720. Its totient is φ = 41942707200.

The previous prime is 168323791481. The next prime is 168323791507. The reversal of 168323791500 is 5197323861.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (168323791507) 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 191 ways as a sum of consecutive naturals, for example, 468868321 + ... + 468868679.

It is an arithmetic number, because the mean of its divisors is an integer number (1019556720).

Almost surely, 2^168323791500 is an apocalyptic number.

168323791500 is a gapful number since it is divisible by the number (10) 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 168323791500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293632335360).

168323791500 is an abundant number, since it is smaller than the sum of its proper divisors (418940879220).

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

168323791500 is a wasteful number, since it uses less digits than its factorization.

168323791500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 613 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The spelling of 168323791500 in words is "one hundred sixty-eight billion, three hundred twenty-three million, seven hundred ninety-one thousand, five hundred".