191099100092 has 6 divisors (see below), whose sum is σ = 334423425168. Its totient is φ = 95549550044.

The previous prime is 191099099999. The next prime is 191099100097. The reversal of 191099100092 is 290001990191.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191099100097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23887387508 + ... + 23887387515.

It is an arithmetic number, because the mean of its divisors is an integer number (55737237528).

Almost surely, 2^191099100092 is an apocalyptic number.

It is an amenable number.

191099100092 is a deficient number, since it is larger than the sum of its proper divisors (143324325076).

191099100092 is a wasteful number, since it uses less digits than its factorization.

191099100092 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47774775027 (or 47774775025 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 41.

The spelling of 191099100092 in words is "one hundred ninety-one billion, ninety-nine million, one hundred thousand, ninety-two".