19171490049 has 8 divisors (see below), whose sum is σ = 28402207520. Its totient is φ = 12780993348.

The previous prime is 19171490003. The next prime is 19171490069. The reversal of 19171490049 is 94009417191.

19171490049 is a `hidden beast` number, since 1 + 91 + 71 + 490 + 0 + 4 + 9 = 666.

It is not a de Polignac number, because 19171490049 - 2¹¹ = 19171488001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19171489986 and 19171490013.

It is not an unprimeable number, because it can be changed into a prime (19171490069) 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 in 7 ways as a sum of consecutive naturals, for example, 355027567 + ... + 355027620.

It is an arithmetic number, because the mean of its divisors is an integer number (3550275940).

Almost surely, 2^19171490049 is an apocalyptic number.

It is an amenable number.

19171490049 is a deficient number, since it is larger than the sum of its proper divisors (9230717471).

19171490049 is an equidigital number, since it uses as much as digits as its factorization.

19171490049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710055196 (or 710055190 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The spelling of 19171490049 in words is "nineteen billion, one hundred seventy-one million, four hundred ninety thousand, forty-nine".