191098324991438 has 16 divisors (see below), whose sum is σ = 298944636111744. Its totient is φ = 91513664110080.

The previous prime is 191098324991417. The next prime is 191098324991447. The reversal of 191098324991438 is 834199423890191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15887782895 + ... + 15887794922.

It is an arithmetic number, because the mean of its divisors is an integer number (18684039756984).

Almost surely, 2^{191098324991438} is an apocalyptic number.

191098324991438 is a deficient number, since it is larger than the sum of its proper divisors (107846311120306).

191098324991438 is a wasteful number, since it uses less digits than its factorization.

191098324991438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31775577947.

The product of its (nonzero) digits is 120932352, while the sum is 71.

The spelling of 191098324991438 in words is "one hundred ninety-one trillion, ninety-eight billion, three hundred twenty-four million, nine hundred ninety-one thousand, four hundred thirty-eight".