195900660849 has 24 divisors (see below), whose sum is σ = 267045134368. Its totient is φ = 127740991680.

The previous prime is 195900660763. The next prime is 195900660911. The reversal of 195900660849 is 948066009591.

It is not a de Polignac number, because 195900660849 - 2⁹ = 195900660337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195900660049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11568909 + ... + 11585829.

Almost surely, 2^195900660849 is an apocalyptic number.

It is an amenable number.

195900660849 is a deficient number, since it is larger than the sum of its proper divisors (71144473519).

195900660849 is a wasteful number, since it uses less digits than its factorization.

195900660849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18765 (or 18718 counting only the distinct ones).

The product of its (nonzero) digits is 4199040, while the sum is 57.

The spelling of 195900660849 in words is "one hundred ninety-five billion, nine hundred million, six hundred sixty thousand, eight hundred forty-nine".