168723021823 has 8 divisors (see below), whose sum is σ = 168862656960. Its totient is φ = 168583433760.

The previous prime is 168723021809. The next prime is 168723021851. The reversal of 168723021823 is 328120327861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 168723021823 - 2²⁹ = 168186150911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168723021823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168723024823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11273061 + ... + 11288017.

It is an arithmetic number, because the mean of its divisors is an integer number (21107832120).

Almost surely, 2^168723021823 is an apocalyptic number.

168723021823 is a deficient number, since it is larger than the sum of its proper divisors (139635137).

168723021823 is a wasteful number, since it uses less digits than its factorization.

168723021823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23537.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 168723021823 in words is "one hundred sixty-eight billion, seven hundred twenty-three million, twenty-one thousand, eight hundred twenty-three".