168723021822 has 16 divisors (see below), whose sum is σ = 337451342592. Its totient is φ = 56240124120.

The previous prime is 168723021809. The next prime is 168723021851. The reversal of 168723021822 is 228120327861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280797 + ... + 645207.

It is an arithmetic number, because the mean of its divisors is an integer number (21090708912).

Almost surely, 2^168723021822 is an apocalyptic number.

168723021822 is an abundant number, since it is smaller than the sum of its proper divisors (168728320770).

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

168723021822 is a wasteful number, since it uses less digits than its factorization.

168723021822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441583.

The product of its (nonzero) digits is 129024, while the sum is 42.

The spelling of 168723021822 in words is "one hundred sixty-eight billion, seven hundred twenty-three million, twenty-one thousand, eight hundred twenty-two".