195664280297 has 2 divisors, whose sum is σ = 195664280298. Its totient is φ = 195664280296.

The previous prime is 195664280183. The next prime is 195664280303. The reversal of 195664280297 is 792082466591.

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., 187388557456 + 8275722841 = 432884^2 + 90971^2 .

It is a cyclic number.

It is not a de Polignac number, because 195664280297 - 2²⁴ = 195647503081 is a prime.

It is not a weakly prime, because it can be changed into another prime (195664280797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97832140148 + 97832140149.

It is an arithmetic number, because the mean of its divisors is an integer number (97832140149).

Almost surely, 2^195664280297 is an apocalyptic number.

It is an amenable number.

195664280297 is a deficient number, since it is larger than the sum of its proper divisors (1).

195664280297 is an equidigital number, since it uses as much as digits as its factorization.

195664280297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 195664280297 in words is "one hundred ninety-five billion, six hundred sixty-four million, two hundred eighty thousand, two hundred ninety-seven".