7644004889 has 2 divisors, whose sum is σ = 7644004890. Its totient is φ = 7644004888.

The previous prime is 7644004883. The next prime is 7644004909. The reversal of 7644004889 is 9884004467.

7644004889 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6193690000 + 1450314889 = 78700^2 + 38083^2 .

It is a cyclic number.

It is not a de Polignac number, because 7644004889 - 2⁴ = 7644004873 is a prime.

It is not a weakly prime, because it can be changed into another prime (7644004883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3822002444 + 3822002445.

It is an arithmetic number, because the mean of its divisors is an integer number (3822002445).

Almost surely, 2^7644004889 is an apocalyptic number.

It is an amenable number.

7644004889 is a deficient number, since it is larger than the sum of its proper divisors (1).

7644004889 is an equidigital number, since it uses as much as digits as its factorization.

7644004889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1548288, while the sum is 50.

The square root of 7644004889 is about 87429.9999370925. Note that the first 4 decimals coincide. The cubic root of 7644004889 is about 1969.8824849378.

The spelling of 7644004889 in words is "seven billion, six hundred forty-four million, four thousand, eight hundred eighty-nine".