189533348991 has 12 divisors (see below), whose sum is σ = 312880449232. Its totient is φ = 108304770816.

The previous prime is 189533348929. The next prime is 189533349001. The reversal of 189533348991 is 199843335981.

189533348991 is a `hidden beast` number, since 1 + 8 + 9 + 533 + 3 + 4 + 8 + 9 + 91 = 666.

It is not a de Polignac number, because 189533348991 - 2¹⁵ = 189533316223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 3008465857 = 189533348991 / (1 + 8 + 9 + 5 + 3 + 3 + 3 + 4 + 8 + 9 + 9 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189533448991) 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 11 ways as a sum of consecutive naturals, for example, 1504232866 + ... + 1504232991.

Almost surely, 2^189533348991 is an apocalyptic number.

189533348991 is a deficient number, since it is larger than the sum of its proper divisors (123347100241).

189533348991 is a wasteful number, since it uses less digits than its factorization.

189533348991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3008465870 (or 3008465867 counting only the distinct ones).

The product of its digits is 25194240, while the sum is 63.

The spelling of 189533348991 in words is "one hundred eighty-nine billion, five hundred thirty-three million, three hundred forty-eight thousand, nine hundred ninety-one".