195665697013 has 2 divisors, whose sum is σ = 195665697014. Its totient is φ = 195665697012.

The previous prime is 195665696951. The next prime is 195665697023. The reversal of 195665697013 is 310796566591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170847475569 + 24818221444 = 413337^2 + 157538^2 .

It is a cyclic number.

It is not a de Polignac number, because 195665697013 - 2²¹ = 195663599861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195665697023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97832848506 + 97832848507.

It is an arithmetic number, because the mean of its divisors is an integer number (97832848507).

Almost surely, 2^195665697013 is an apocalyptic number.

It is an amenable number.

195665697013 is a deficient number, since it is larger than the sum of its proper divisors (1).

195665697013 is an equidigital number, since it uses as much as digits as its factorization.

195665697013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9185400, while the sum is 58.

The spelling of 195665697013 in words is "one hundred ninety-five billion, six hundred sixty-five million, six hundred ninety-seven thousand, thirteen".