191728627368 has 128 divisors (see below), whose sum is σ = 495461491200. Its totient is φ = 61796047104.

The previous prime is 191728627331. The next prime is 191728627439. The reversal of 191728627368 is 863726827191.

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, 94586371 + ... + 94588397.

It is an arithmetic number, because the mean of its divisors is an integer number (3870792900).

Almost surely, 2^191728627368 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 191728627368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (247730745600).

191728627368 is an abundant number, since it is smaller than the sum of its proper divisors (303732863832).

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

191728627368 is a wasteful number, since it uses less digits than its factorization.

191728627368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159 (or 3155 counting only the distinct ones).

The product of its digits is 12192768, while the sum is 60.

The spelling of 191728627368 in words is "one hundred ninety-one billion, seven hundred twenty-eight million, six hundred twenty-seven thousand, three hundred sixty-eight".