191368698049 has 4 divisors (see below), whose sum is σ = 191379270960. Its totient is φ = 191358125140.

The previous prime is 191368698043. The next prime is 191368698089. The reversal of 191368698049 is 940896863191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 191368698049 - 2⁹ = 191368697537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191368698043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5259259 + ... + 5295520.

It is an arithmetic number, because the mean of its divisors is an integer number (47844817740).

Almost surely, 2^191368698049 is an apocalyptic number.

It is an amenable number.

191368698049 is a deficient number, since it is larger than the sum of its proper divisors (10572911).

191368698049 is a wasteful number, since it uses less digits than its factorization.

191368698049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10572910.

The product of its (nonzero) digits is 20155392, while the sum is 64.

The spelling of 191368698049 in words is "one hundred ninety-one billion, three hundred sixty-eight million, six hundred ninety-eight thousand, forty-nine".