9446189891 has 6 divisors (see below), whose sum is σ = 9969524892. Its totient is φ = 8949021660.

The previous prime is 9446189887. The next prime is 9446189917. The reversal of 9446189891 is 1989816449.

9446189891 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9446189891 - 2² = 9446189887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9446189891.

It is not an unprimeable number, because it can be changed into a prime (9446189821) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13083005 + ... + 13083726.

It is an arithmetic number, because the mean of its divisors is an integer number (1661587482).

Almost surely, 2^9446189891 is an apocalyptic number.

9446189891 is a deficient number, since it is larger than the sum of its proper divisors (523335001).

9446189891 is a wasteful number, since it uses less digits than its factorization.

9446189891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26166769 (or 26166750 counting only the distinct ones).

The product of its digits is 4478976, while the sum is 59.

The square root of 9446189891 is about 97191.5114143205. The cubic root of 9446189891 is about 2113.9054441086.

The spelling of 9446189891 in words is "nine billion, four hundred forty-six million, one hundred eighty-nine thousand, eight hundred ninety-one".