8944191009 has 12 divisors (see below), whose sum is σ = 13913186196. Its totient is φ = 5504117472.

The previous prime is 8944190989. The next prime is 8944191023. The reversal of 8944191009 is 9001914498.

It can be written as a sum of positive squares in 2 ways, for example, as 5108246784 + 3835944225 = 71472^2 + 61935^2 .

It is not a de Polignac number, because 8944191009 - 2³¹ = 6796707361 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8944191059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38222922 + ... + 38223155.

It is an arithmetic number, because the mean of its divisors is an integer number (1159432183).

Almost surely, 2^8944191009 is an apocalyptic number.

It is an amenable number.

8944191009 is a deficient number, since it is larger than the sum of its proper divisors (4968995187).

8944191009 is a wasteful number, since it uses less digits than its factorization.

8944191009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76446096 (or 76446093 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 8944191009 is about 94573.7331873919. The cubic root of 8944191009 is about 2075.7753726073.

The spelling of 8944191009 in words is "eight billion, nine hundred forty-four million, one hundred ninety-one thousand, nine".