189118911091 has 8 divisors (see below), whose sum is σ = 206440422768. Its totient is φ = 171818880000.

The previous prime is 189118911071. The next prime is 189118911101. The reversal of 189118911091 is 190119811981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 189118911091 - 2³¹ = 186971427443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189118911001) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5351730 + ... + 5386951.

It is an arithmetic number, because the mean of its divisors is an integer number (25805052846).

Almost surely, 2^189118911091 is an apocalyptic number.

189118911091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

189118911091 is a deficient number, since it is larger than the sum of its proper divisors (17321511677).

189118911091 is a wasteful number, since it uses less digits than its factorization.

189118911091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10740293.

The product of its (nonzero) digits is 46656, while the sum is 49.

The spelling of 189118911091 in words is "one hundred eighty-nine billion, one hundred eighteen million, nine hundred eleven thousand, ninety-one".