168385518720 has 96 divisors (see below), whose sum is σ = 581456264220. Its totient is φ = 44902803456.

The previous prime is 168385518701. The next prime is 168385518761. The reversal of 168385518720 is 27815583861.

168385518720 is a `hidden beast` number, since 1 + 6 + 8 + 3 + 8 + 551 + 87 + 2 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 168369067584 + 16451136 = 410328^2 + 4056^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14611039 + ... + 14622558.

Almost surely, 2^168385518720 is an apocalyptic number.

168385518720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168385518720 is an abundant number, since it is smaller than the sum of its proper divisors (413070745500).

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

168385518720 is a wasteful number, since it uses less digits than its factorization.

168385518720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29233622 (or 29233607 counting only the distinct ones).

The product of its (nonzero) digits is 3225600, while the sum is 54.

The spelling of 168385518720 in words is "one hundred sixty-eight billion, three hundred eighty-five million, five hundred eighteen thousand, seven hundred twenty".