191106117442 has 4 divisors (see below), whose sum is σ = 286659176166. Its totient is φ = 95553058720.

The previous prime is 191106117413. The next prime is 191106117481. The reversal of 191106117442 is 244711601191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244711601191 = 201611 ⋅1213781.

It can be written as a sum of positive squares in only one way, i.e., 191074768641 + 31348801 = 437121^2 + 5599^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47776529359 + ... + 47776529362.

Almost surely, 2^191106117442 is an apocalyptic number.

191106117442 is a deficient number, since it is larger than the sum of its proper divisors (95553058724).

191106117442 is an equidigital number, since it uses as much as digits as its factorization.

191106117442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95553058723.

The product of its (nonzero) digits is 12096, while the sum is 37.

The spelling of 191106117442 in words is "one hundred ninety-one billion, one hundred six million, one hundred seventeen thousand, four hundred forty-two".