191363316985 has 16 divisors (see below), whose sum is σ = 244754220672. Its totient is φ = 143131104000.

The previous prime is 191363316967. The next prime is 191363317003. The reversal of 191363316985 is 589613363191.

It is an interprime number because it is at equal distance from previous prime (191363316967) and next prime (191363317003).

It is not a de Polignac number, because 191363316985 - 2¹⁹ = 191362792697 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7441911 + ... + 7467580.

It is an arithmetic number, because the mean of its divisors is an integer number (15297138792).

Almost surely, 2^191363316985 is an apocalyptic number.

It is an amenable number.

191363316985 is a deficient number, since it is larger than the sum of its proper divisors (53390903687).

191363316985 is a wasteful number, since it uses less digits than its factorization.

191363316985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14909664.

The product of its digits is 3149280, while the sum is 55.

The spelling of 191363316985 in words is "one hundred ninety-one billion, three hundred sixty-three million, three hundred sixteen thousand, nine hundred eighty-five".