195845978938 has 16 divisors (see below), whose sum is σ = 311278386240. Its totient is φ = 92154780000.

The previous prime is 195845978921. The next prime is 195845978947. The reversal of 195845978938 is 839879548591.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17059963 + ... + 17071438.

It is an arithmetic number, because the mean of its divisors is an integer number (19454899140).

Almost surely, 2^195845978938 is an apocalyptic number.

195845978938 is a deficient number, since it is larger than the sum of its proper divisors (115432407302).

195845978938 is a wasteful number, since it uses less digits than its factorization.

195845978938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34131573.

The product of its digits is 783820800, while the sum is 76.

The spelling of 195845978938 in words is "one hundred ninety-five billion, eight hundred forty-five million, nine hundred seventy-eight thousand, nine hundred thirty-eight".