195243709807 has 16 divisors (see below), whose sum is σ = 199105592832. Its totient is φ = 191411066880.

The previous prime is 195243709763. The next prime is 195243709849. The reversal of 195243709807 is 708907342591.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 195243709807 - 2³⁵ = 160883971439 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 (195243709867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22225338 + ... + 22234120.

It is an arithmetic number, because the mean of its divisors is an integer number (12444099552).

Almost surely, 2^195243709807 is an apocalyptic number.

195243709807 is a deficient number, since it is larger than the sum of its proper divisors (3861883025).

195243709807 is a wasteful number, since it uses less digits than its factorization.

195243709807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10398.

The product of its (nonzero) digits is 3810240, while the sum is 55.

The spelling of 195243709807 in words is "one hundred ninety-five billion, two hundred forty-three million, seven hundred nine thousand, eight hundred seven".