189428607133791 has 4 divisors (see below), whose sum is σ = 252571476178392. Its totient is φ = 126285738089192.

The previous prime is 189428607133699. The next prime is 189428607133849. The reversal of 189428607133791 is 197331706824981.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 189428607133791 - 2⁹ = 189428607133279 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189428607133891) 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 in 3 ways as a sum of consecutive naturals, for example, 31571434522296 + ... + 31571434522301.

It is an arithmetic number, because the mean of its divisors is an integer number (63142869044598).

Almost surely, 2^{189428607133791} is an apocalyptic number.

189428607133791 is a deficient number, since it is larger than the sum of its proper divisors (63142869044601).

189428607133791 is an equidigital number, since it uses as much as digits as its factorization.

189428607133791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63142869044600.

The product of its (nonzero) digits is 109734912, while the sum is 69.

The spelling of 189428607133791 in words is "one hundred eighty-nine trillion, four hundred twenty-eight billion, six hundred seven million, one hundred thirty-three thousand, seven hundred ninety-one".