195805439605 has 16 divisors (see below), whose sum is σ = 237351573504. Its totient is φ = 155059894080.

The previous prime is 195805439597. The next prime is 195805439611. The reversal of 195805439605 is 506934508591.

It is not a de Polignac number, because 195805439605 - 2³ = 195805439597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66726 + ... + 629335.

It is an arithmetic number, because the mean of its divisors is an integer number (14834473344).

Almost surely, 2^195805439605 is an apocalyptic number.

It is an amenable number.

195805439605 is a deficient number, since it is larger than the sum of its proper divisors (41546133899).

195805439605 is a wasteful number, since it uses less digits than its factorization.

195805439605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 696636.

The product of its (nonzero) digits is 5832000, while the sum is 55.

The spelling of 195805439605 in words is "one hundred ninety-five billion, eight hundred five million, four hundred thirty-nine thousand, six hundred five".