168321137910 has 32 divisors (see below), whose sum is σ = 405461417472. Its totient is φ = 44720004960.

The previous prime is 168321137909. The next prime is 168321137923. The reversal of 168321137910 is 19731123861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10343724 + ... + 10359983.

It is an arithmetic number, because the mean of its divisors is an integer number (12670669296).

Almost surely, 2^168321137910 is an apocalyptic number.

168321137910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168321137910 is an abundant number, since it is smaller than the sum of its proper divisors (237140279562).

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

168321137910 is a wasteful number, since it uses less digits than its factorization.

168321137910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20703988.

The product of its (nonzero) digits is 54432, while the sum is 42.

The spelling of 168321137910 in words is "one hundred sixty-eight billion, three hundred twenty-one million, one hundred thirty-seven thousand, nine hundred ten".