191512368216 has 192 divisors, whose sum is σ = 562938405120. Its totient is φ = 58468227840.

The previous prime is 191512368209. The next prime is 191512368217. The reversal of 191512368216 is 612863215191.

It is a happy number.

191512368216 is a `hidden beast` number, since 1 + 91 + 512 + 36 + 8 + 2 + 16 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191512368217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170535831 + ... + 170536953.

It is an arithmetic number, because the mean of its divisors is an integer number (2931970860).

Almost surely, 2^191512368216 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 191512368216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281469202560).

191512368216 is an abundant number, since it is smaller than the sum of its proper divisors (371426036904).

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

191512368216 is a wasteful number, since it uses less digits than its factorization.

191512368216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2406 (or 2399 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The spelling of 191512368216 in words is "one hundred ninety-one billion, five hundred twelve million, three hundred sixty-eight thousand, two hundred sixteen".