19172191559 has 2 divisors, whose sum is σ = 19172191560. Its totient is φ = 19172191558.

The previous prime is 19172191531. The next prime is 19172191573. The reversal of 19172191559 is 95519127191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19172191559 - 2²⁰ = 19171142983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19172161559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9586095779 + 9586095780.

It is an arithmetic number, because the mean of its divisors is an integer number (9586095780).

Almost surely, 2^19172191559 is an apocalyptic number.

19172191559 is a deficient number, since it is larger than the sum of its proper divisors (1).

19172191559 is an equidigital number, since it uses as much as digits as its factorization.

19172191559 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 255150, while the sum is 50.

The spelling of 19172191559 in words is "nineteen billion, one hundred seventy-two million, one hundred ninety-one thousand, five hundred fifty-nine".