195811799089 has 2 divisors, whose sum is σ = 195811799090. Its totient is φ = 195811799088.

The previous prime is 195811799011. The next prime is 195811799093. The reversal of 195811799089 is 980997118591.

195811799089 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 can be written as a sum of positive squares in only one way, i.e., 110079959089 + 85731840000 = 331783^2 + 292800^2 .

It is a cyclic number.

It is not a de Polignac number, because 195811799089 - 2⁷ = 195811798961 is a prime.

It is not a weakly prime, because it can be changed into another prime (195811799389) 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, 97905899544 + 97905899545.

It is an arithmetic number, because the mean of its divisors is an integer number (97905899545).

Almost surely, 2^195811799089 is an apocalyptic number.

It is an amenable number.

195811799089 is a deficient number, since it is larger than the sum of its proper divisors (1).

195811799089 is an equidigital number, since it uses as much as digits as its factorization.

195811799089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14696640, while the sum is 67.

The spelling of 195811799089 in words is "one hundred ninety-five billion, eight hundred eleven million, seven hundred ninety-nine thousand, eighty-nine".