199019744791 has 8 divisors (see below), whose sum is σ = 227467946880. Its totient is φ = 170575745208.

The previous prime is 199019744789. The next prime is 199019744813. The reversal of 199019744791 is 197447910991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199019744791 - 2¹ = 199019744789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199019744711) 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, 948481 + ... + 1139146.

It is an arithmetic number, because the mean of its divisors is an integer number (28433493360).

Almost surely, 2^199019744791 is an apocalyptic number.

199019744791 is a deficient number, since it is larger than the sum of its proper divisors (28448202089).

199019744791 is a wasteful number, since it uses less digits than its factorization.

199019744791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101253.

The product of its (nonzero) digits is 5143824, while the sum is 61.

The spelling of 199019744791 in words is "one hundred ninety-nine billion, nineteen million, seven hundred forty-four thousand, seven hundred ninety-one".