195816643 has 8 divisors (see below), whose sum is σ = 216019440. Its totient is φ = 176014080.

The previous prime is 195816619. The next prime is 195816653. The reversal of 195816643 is 346618591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 195816643 - 2¹⁷ = 195685571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 195816643.

It is not an unprimeable number, because it can be changed into a prime (195816653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99030 + ... + 100987.

It is an arithmetic number, because the mean of its divisors is an integer number (27002430).

Almost surely, 2^195816643 is an apocalyptic number.

195816643 is a deficient number, since it is larger than the sum of its proper divisors (20202797).

195816643 is a wasteful number, since it uses less digits than its factorization.

195816643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200117.

The product of its digits is 155520, while the sum is 43.

The square root of 195816643 is about 13993.4500034838. The cubic root of 195816643 is about 580.6973805291.

The spelling of 195816643 in words is "one hundred ninety-five million, eight hundred sixteen thousand, six hundred forty-three".