168520180320 has 192 divisors, whose sum is σ = 593082060480. Its totient is φ = 44690227200.

The previous prime is 168520180223. The next prime is 168520180321. The reversal of 168520180320 is 23081025861.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168520180321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 674160 + ... + 889680.

It is an arithmetic number, because the mean of its divisors is an integer number (3088969065).

Almost surely, 2^168520180320 is an apocalyptic number.

168520180320 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 168520180320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296541030240).

168520180320 is an abundant number, since it is smaller than the sum of its proper divisors (424561880160).

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

168520180320 is a wasteful number, since it uses less digits than its factorization.

168520180320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215726 (or 215712 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 168520180320 in words is "one hundred sixty-eight billion, five hundred twenty million, one hundred eighty thousand, three hundred twenty".