195641868029 has 2 divisors, whose sum is σ = 195641868030. Its totient is φ = 195641868028.

The previous prime is 195641867989. The next prime is 195641868047. The reversal of 195641868029 is 920868146591.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145102331929 + 50539536100 = 380923^2 + 224810^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195641868029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195641808029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97820934014 + 97820934015.

It is an arithmetic number, because the mean of its divisors is an integer number (97820934015).

Almost surely, 2^195641868029 is an apocalyptic number.

It is an amenable number.

195641868029 is a deficient number, since it is larger than the sum of its proper divisors (1).

195641868029 is an equidigital number, since it uses as much as digits as its factorization.

195641868029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7464960, while the sum is 59.

The spelling of 195641868029 in words is "one hundred ninety-five billion, six hundred forty-one million, eight hundred sixty-eight thousand, twenty-nine".