195195065389 has 2 divisors, whose sum is σ = 195195065390. Its totient is φ = 195195065388.

The previous prime is 195195065323. The next prime is 195195065419. The reversal of 195195065389 is 983560591591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 112275255625 + 82919809764 = 335075^2 + 287958^2 .

It is a cyclic number.

It is not a de Polignac number, because 195195065389 - 2¹¹ = 195195063341 is a prime.

It is a super-2 number, since 2×195195065389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195195065789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97597532694 + 97597532695.

It is an arithmetic number, because the mean of its divisors is an integer number (97597532695).

Almost surely, 2^195195065389 is an apocalyptic number.

It is an amenable number.

195195065389 is a deficient number, since it is larger than the sum of its proper divisors (1).

195195065389 is an equidigital number, since it uses as much as digits as its factorization.

195195065389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13122000, while the sum is 61.

The spelling of 195195065389 in words is "one hundred ninety-five billion, one hundred ninety-five million, sixty-five thousand, three hundred eighty-nine".