189391196722446 has 256 divisors, whose sum is σ = 452897024025600. Its totient is φ = 58490302611456.

The previous prime is 189391196722439. The next prime is 189391196722451. The reversal of 189391196722446 is 644227691193981.

189391196722446 is a `hidden beast` number, since 1 + 8 + 9 + 3 + 9 + 119 + 67 + 2 + 2 + 446 = 666.

189391196722446 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4437760060 + ... + 4437802736.

It is an arithmetic number, because the mean of its divisors is an integer number (1769129000100).

Almost surely, 2^{189391196722446} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189391196722446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226448512012800).

189391196722446 is an abundant number, since it is smaller than the sum of its proper divisors (263505827303154).

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

189391196722446 is a wasteful number, since it uses less digits than its factorization.

189391196722446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43280 (or 43274 counting only the distinct ones).

The product of its digits is 282175488, while the sum is 72.

The spelling of 189391196722446 in words is "one hundred eighty-nine trillion, three hundred ninety-one billion, one hundred ninety-six million, seven hundred twenty-two thousand, four hundred forty-six".