168300924921 has 24 divisors (see below), whose sum is σ = 251265006720. Its totient is φ = 108490294176.

The previous prime is 168300924917. The next prime is 168300924931. The reversal of 168300924921 is 129429003861.

It is not a de Polignac number, because 168300924921 - 2² = 168300924917 is a prime.

It is not an unprimeable number, because it can be changed into a prime (168300924931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2361726 + ... + 2431943.

It is an arithmetic number, because the mean of its divisors is an integer number (10469375280).

Almost surely, 2^168300924921 is an apocalyptic number.

It is an amenable number.

168300924921 is a deficient number, since it is larger than the sum of its proper divisors (82964081799).

168300924921 is a wasteful number, since it uses less digits than its factorization.

168300924921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4793805 (or 4793802 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The spelling of 168300924921 in words is "one hundred sixty-eight billion, three hundred million, nine hundred twenty-four thousand, nine hundred twenty-one".