195159446768 has 80 divisors (see below), whose sum is σ = 446333016192. Its totient is φ = 81496800000.

The previous prime is 195159446761. The next prime is 195159446819. The reversal of 195159446768 is 867644951591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195159446761) 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, 280643 + ... + 684893.

Almost surely, 2^195159446768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 195159446768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223166508096).

195159446768 is an abundant number, since it is smaller than the sum of its proper divisors (251173569424).

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

195159446768 is a wasteful number, since it uses less digits than its factorization.

195159446768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404494 (or 404488 counting only the distinct ones).

The product of its digits is 65318400, while the sum is 65.

The spelling of 195159446768 in words is "one hundred ninety-five billion, one hundred fifty-nine million, four hundred forty-six thousand, seven hundred sixty-eight".