168309720000 has 210 divisors, whose sum is σ = 602845096568. Its totient is φ = 44882496000.

The previous prime is 168309719993. The next prime is 168309720011. The reversal of 168309720000 is 27903861.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 126237 + ... + 593763.

Almost surely, 2^168309720000 is an apocalyptic number.

168309720000 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 168309720000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301422548284).

168309720000 is an abundant number, since it is smaller than the sum of its proper divisors (434535376568).

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

168309720000 is an equidigital number, since it uses as much as digits as its factorization.

168309720000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467565 (or 467537 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The spelling of 168309720000 in words is "one hundred sixty-eight billion, three hundred nine million, seven hundred twenty thousand".