195908568616 has 16 divisors (see below), whose sum is σ = 388936129140. Its totient is φ = 92192267520.

The previous prime is 195908568547. The next prime is 195908568637. The reversal of 195908568616 is 616865809591.

It can be written as a sum of positive squares in 2 ways, for example, as 186663746116 + 9244822500 = 432046^2 + 96150^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 720251955 + ... + 720252226.

Almost surely, 2^195908568616 is an apocalyptic number.

It is an amenable number.

195908568616 is a deficient number, since it is larger than the sum of its proper divisors (193027560524).

195908568616 is a wasteful number, since it uses less digits than its factorization.

195908568616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1440504204 (or 1440504200 counting only the distinct ones).

The product of its (nonzero) digits is 27993600, while the sum is 64.

The spelling of 195908568616 in words is "one hundred ninety-five billion, nine hundred eight million, five hundred sixty-eight thousand, six hundred sixteen".