168109793280 has 896 divisors, whose sum is σ = 702838563840. Its totient is φ = 37583585280.

The previous prime is 168109793263. The next prime is 168109793309. The reversal of 168109793280 is 82397901861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 158146029 + ... + 158147091.

It is an arithmetic number, because the mean of its divisors is an integer number (784418040).

Almost surely, 2^168109793280 is an apocalyptic number.

168109793280 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 168109793280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (351419281920).

168109793280 is an abundant number, since it is smaller than the sum of its proper divisors (534728770560).

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

168109793280 is a wasteful number, since it uses less digits than its factorization.

168109793280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1127 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The spelling of 168109793280 in words is "one hundred sixty-eight billion, one hundred nine million, seven hundred ninety-three thousand, two hundred eighty".