195840792100817 has 2 divisors, whose sum is σ = 195840792100818. Its totient is φ = 195840792100816.

The previous prime is 195840792100777. The next prime is 195840792100897. The reversal of 195840792100817 is 718001297048591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138530804947921 + 57309987152896 = 11769911^2 + 7570336^2 .

It is a cyclic number.

It is not a de Polignac number, because 195840792100817 - 2⁸ = 195840792100561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 195840792100817.

It is not a weakly prime, because it can be changed into another prime (195840792100897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97920396050408 + 97920396050409.

It is an arithmetic number, because the mean of its divisors is an integer number (97920396050409).

Almost surely, 2^{195840792100817} is an apocalyptic number.

It is an amenable number.

195840792100817 is a deficient number, since it is larger than the sum of its proper divisors (1).

195840792100817 is an equidigital number, since it uses as much as digits as its factorization.

195840792100817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 62.

The spelling of 195840792100817 in words is "one hundred ninety-five trillion, eight hundred forty billion, seven hundred ninety-two million, one hundred thousand, eight hundred seventeen".