199619344226242 has 16 divisors (see below), whose sum is σ = 301463157699000. Its totient is φ = 99131734107520.

The previous prime is 199619344226201. The next prime is 199619344226261. The reversal of 199619344226242 is 242622443916991.

It is a Cunningham number, because it is equal to 14128671²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 174459479472721 + 25159864753521 = 13208311^2 + 5015961^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23612617 + ... + 30932092.

Almost surely, 2^{199619344226242} is an apocalyptic number.

199619344226242 is a deficient number, since it is larger than the sum of its proper divisors (101843813472758).

199619344226242 is a wasteful number, since it uses less digits than its factorization.

199619344226242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54557141.

The product of its digits is 80621568, while the sum is 64.

The spelling of 199619344226242 in words is "one hundred ninety-nine trillion, six hundred nineteen billion, three hundred forty-four million, two hundred twenty-six thousand, two hundred forty-two".