195444349191 has 72 divisors (see below), whose sum is σ = 369916990560. Its totient is φ = 97027227648.

The previous prime is 195444349187. The next prime is 195444349201. The reversal of 195444349191 is 191943444591.

195444349191 is a `hidden beast` number, since 1 + 9 + 5 + 4 + 443 + 4 + 9 + 191 = 666.

It is not a de Polignac number, because 195444349191 - 2² = 195444349187 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195444249191) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 358906 + ... + 720903.

It is an arithmetic number, because the mean of its divisors is an integer number (5137735980).

Almost surely, 2^195444349191 is an apocalyptic number.

195444349191 is a deficient number, since it is larger than the sum of its proper divisors (174472641369).

195444349191 is a wasteful number, since it uses less digits than its factorization.

195444349191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1079865 (or 1079849 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The spelling of 195444349191 in words is "one hundred ninety-five billion, four hundred forty-four million, three hundred forty-nine thousand, one hundred ninety-one".