158168251922 has 42 divisors (see below), whose sum is σ = 256690167429. Its totient is φ = 73094442480.

The previous prime is 158168251883. The next prime is 158168251931. The reversal of 158168251922 is 229152861851.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 112957160281 + 45211091641 = 336091^2 + 212629^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=281219.

It is a super-2 number, since 2×158168251922² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 3857762222 + ... + 3857762262.

Almost surely, 2^158168251922 is an apocalyptic number.

158168251922 is a deficient number, since it is larger than the sum of its proper divisors (98521915507).

158168251922 is an frugal number, since it uses more digits than its factorization.

158168251922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198 (or 62 counting only the distinct ones).

The product of its digits is 691200, while the sum is 50.

Multiplying 158168251922 by its sum of digits (50), we get a square (7908412596100 = 2812190²).

The spelling of 158168251922 in words is "one hundred fifty-eight billion, one hundred sixty-eight million, two hundred fifty-one thousand, nine hundred twenty-two".