195168551693 has 4 divisors (see below), whose sum is σ = 195873131580. Its totient is φ = 194463971808.

The previous prime is 195168551687. The next prime is 195168551729. The reversal of 195168551693 is 396155861591.

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 50948615524 + 144219936169 = 225718^2 + 379763^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-195168551693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195168551293) 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, 352289528 + ... + 352290081.

It is an arithmetic number, because the mean of its divisors is an integer number (48968282895).

Almost surely, 2^195168551693 is an apocalyptic number.

It is an amenable number.

195168551693 is a deficient number, since it is larger than the sum of its proper divisors (704579887).

195168551693 is an equidigital number, since it uses as much as digits as its factorization.

195168551693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704579886.

The product of its digits is 8748000, while the sum is 59.

The spelling of 195168551693 in words is "one hundred ninety-five billion, one hundred sixty-eight million, five hundred fifty-one thousand, six hundred ninety-three".