168726864240 has 640 divisors, whose sum is σ = 662379033600. Its totient is φ = 39111413760.

The previous prime is 168726864233. The next prime is 168726864259. The reversal of 168726864240 is 42468627861.

It is a happy number.

168726864240 is a `hidden beast` number, since 1 + 6 + 87 + 268 + 64 + 240 = 666.

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 127 ways as a sum of consecutive naturals, for example, 51866454 + ... + 51869706.

It is an arithmetic number, because the mean of its divisors is an integer number (1034967240).

Almost surely, 2^168726864240 is an apocalyptic number.

168726864240 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 168726864240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331189516800).

168726864240 is an abundant number, since it is smaller than the sum of its proper divisors (493652169360).

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

168726864240 is a wasteful number, since it uses less digits than its factorization.

168726864240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382 (or 3370 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 168726864240 in words is "one hundred sixty-eight billion, seven hundred twenty-six million, eight hundred sixty-four thousand, two hundred forty".