191049690384 has 120 divisors (see below), whose sum is σ = 613748366400. Its totient is φ = 54345095424.

The previous prime is 191049690379. The next prime is 191049690401. The reversal of 191049690384 is 483096940191.

It is a happy number.

191049690384 is a `hidden beast` number, since 1 + 91 + 0 + 4 + 96 + 90 + 384 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 191049690384.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 188659 + ... + 646290.

It is an arithmetic number, because the mean of its divisors is an integer number (5114569720).

Almost surely, 2^191049690384 is an apocalyptic number.

191049690384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

191049690384 is an abundant number, since it is smaller than the sum of its proper divisors (422698676016).

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

191049690384 is a wasteful number, since it uses less digits than its factorization.

191049690384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835197 (or 835188 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 191049690384 in words is "one hundred ninety-one billion, forty-nine million, six hundred ninety thousand, three hundred eighty-four".