195808512899 has 2 divisors, whose sum is σ = 195808512900. Its totient is φ = 195808512898.

The previous prime is 195808512841. The next prime is 195808512919. The reversal of 195808512899 is 998215808591.

195808512899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195808512899 - 2⁸ = 195808512643 is a prime.

It is not a weakly prime, because it can be changed into another prime (195808512799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97904256449 + 97904256450.

It is an arithmetic number, because the mean of its divisors is an integer number (97904256450).

Almost surely, 2^195808512899 is an apocalyptic number.

195808512899 is a deficient number, since it is larger than the sum of its proper divisors (1).

195808512899 is an equidigital number, since it uses as much as digits as its factorization.

195808512899 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18662400, while the sum is 65.

The spelling of 195808512899 in words is "one hundred ninety-five billion, eight hundred eight million, five hundred twelve thousand, eight hundred ninety-nine".