191384920105 has 16 divisors (see below), whose sum is σ = 233327305728. Its totient is φ = 150672312000.

The previous prime is 191384920081. The next prime is 191384920189. The reversal of 191384920105 is 501029483191.

It is not a de Polignac number, because 191384920105 - 2²⁹ = 190848049193 is a prime.

It is a super-2 number, since 2×191384920105² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 306201 + ... + 690310.

It is an arithmetic number, because the mean of its divisors is an integer number (14582956608).

Almost surely, 2^191384920105 is an apocalyptic number.

It is an amenable number.

191384920105 is a deficient number, since it is larger than the sum of its proper divisors (41942385623).

191384920105 is an equidigital number, since it uses as much as digits as its factorization.

191384920105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997128.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 191384920105 in words is "one hundred ninety-one billion, three hundred eighty-four million, nine hundred twenty thousand, one hundred five".