168390971922 has 16 divisors (see below), whose sum is σ = 338227362720. Its totient is φ = 55889420832.

The previous prime is 168390971909. The next prime is 168390971929. The reversal of 168390971922 is 229179093861.

It is not an unprimeable number, because it can be changed into a prime (168390971929) 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, 60224272 + ... + 60227067.

It is an arithmetic number, because the mean of its divisors is an integer number (21139210170).

Almost surely, 2^168390971922 is an apocalyptic number.

168390971922 is an abundant number, since it is smaller than the sum of its proper divisors (169836390798).

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

168390971922 is a wasteful number, since it uses less digits than its factorization.

168390971922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120451577.

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 168390971922 in words is "one hundred sixty-eight billion, three hundred ninety million, nine hundred seventy-one thousand, nine hundred twenty-two".