195668835217 has 4 divisors (see below), whose sum is σ = 195692223780. Its totient is φ = 195645446656.

The previous prime is 195668835181. The next prime is 195668835227. The reversal of 195668835217 is 712538866591.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 129574081296 + 66094753921 = 359964^2 + 257089^2 .

It is a cyclic number.

It is not a de Polignac number, because 195668835217 - 2¹¹ = 195668833169 is a prime.

It is a super-3 number, since 3×195668835217³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195668835227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11681728 + ... + 11698465.

It is an arithmetic number, because the mean of its divisors is an integer number (48923055945).

Almost surely, 2^195668835217 is an apocalyptic number.

It is an amenable number.

195668835217 is a deficient number, since it is larger than the sum of its proper divisors (23388563).

195668835217 is an equidigital number, since it uses as much as digits as its factorization.

195668835217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23388562.

The product of its digits is 21772800, while the sum is 61.

The spelling of 195668835217 in words is "one hundred ninety-five billion, six hundred sixty-eight million, eight hundred thirty-five thousand, two hundred seventeen".