8189644844 has 6 divisors (see below), whose sum is σ = 14331878484. Its totient is φ = 4094822420.

The previous prime is 8189644843. The next prime is 8189644871. The reversal of 8189644844 is 4484469818.

It is a self number, because there is not a number n which added to its sum of digits gives 8189644844.

It is not an unprimeable number, because it can be changed into a prime (8189644843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1023705602 + ... + 1023705609.

It is an arithmetic number, because the mean of its divisors is an integer number (2388646414).

Almost surely, 2^8189644844 is an apocalyptic number.

It is an amenable number.

8189644844 is a deficient number, since it is larger than the sum of its proper divisors (6142233640).

8189644844 is a wasteful number, since it uses less digits than its factorization.

8189644844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047411215 (or 2047411213 counting only the distinct ones).

The product of its digits is 7077888, while the sum is 56.

The square root of 8189644844 is about 90496.6565349240. The cubic root of 8189644844 is about 2015.6804770305.

The spelling of 8189644844 in words is "eight billion, one hundred eighty-nine million, six hundred forty-four thousand, eight hundred forty-four".