15942193922 has 54 divisors (see below), whose sum is σ = 26144523657. Its totient is φ = 7289615088.

The previous prime is 15942193909. The next prime is 15942193963. The reversal of 15942193922 is 22939124951.

It can be written as a sum of positive squares in 2 ways, for example, as 12862054921 + 3080139001 = 113411^2 + 55499^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=89281.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 125529023 + ... + 125529149.

Almost surely, 2^15942193922 is an apocalyptic number.

15942193922 is a deficient number, since it is larger than the sum of its proper divisors (10202329735).

15942193922 is an equidigital number, since it uses as much as digits as its factorization.

15942193922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 185 counting only the distinct ones).

The product of its digits is 349920, while the sum is 47.

The spelling of 15942193922 in words is "fifteen billion, nine hundred forty-two million, one hundred ninety-three thousand, nine hundred twenty-two".