168151911720 has 128 divisors (see below), whose sum is σ = 543533760000. Its totient is φ = 41370384384.

The previous prime is 168151911679. The next prime is 168151911743. The reversal of 168151911720 is 27119151861.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3192156 + ... + 3244404.

It is an arithmetic number, because the mean of its divisors is an integer number (4246357500).

Almost surely, 2^168151911720 is an apocalyptic number.

168151911720 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 168151911720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271766880000).

168151911720 is an abundant number, since it is smaller than the sum of its proper divisors (375381848280).

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

168151911720 is a wasteful number, since it uses less digits than its factorization.

168151911720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54339 (or 54335 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 42.

The spelling of 168151911720 in words is "one hundred sixty-eight billion, one hundred fifty-one million, nine hundred eleven thousand, seven hundred twenty".