195791617368 has 128 divisors (see below), whose sum is σ = 569453068800. Its totient is φ = 62212791168.

The previous prime is 195791617319. The next prime is 195791617387. The reversal of 195791617368 is 863716197591.

195791617368 is a `hidden beast` number, since 1 + 9 + 5 + 7 + 9 + 1 + 617 + 3 + 6 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1388371 + ... + 1522877.

It is an arithmetic number, because the mean of its divisors is an integer number (4448852100).

Almost surely, 2^195791617368 is an apocalyptic number.

195791617368 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195791617368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284726534400).

195791617368 is an abundant number, since it is smaller than the sum of its proper divisors (373661451432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

195791617368 is a wasteful number, since it uses less digits than its factorization.

195791617368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134838 (or 134828 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

The spelling of 195791617368 in words is "one hundred ninety-five billion, seven hundred ninety-one million, six hundred seventeen thousand, three hundred sixty-eight".