4438856809 has 2 divisors, whose sum is σ = 4438856810. Its totient is φ = 4438856808.

The previous prime is 4438856797. The next prime is 4438856837. The reversal of 4438856809 is 9086588344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4115864025 + 322992784 = 64155^2 + 17972^2 .

It is a cyclic number.

It is not a de Polignac number, because 4438856809 - 2²⁷ = 4304639081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4438856809.

It is not a weakly prime, because it can be changed into another prime (4438856869) 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 as a sum of consecutive naturals, namely, 2219428404 + 2219428405.

It is an arithmetic number, because the mean of its divisors is an integer number (2219428405).

Almost surely, 2^4438856809 is an apocalyptic number.

It is an amenable number.

4438856809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4438856809 is an equidigital number, since it uses as much as digits as its factorization.

4438856809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6635520, while the sum is 55.

The square root of 4438856809 is about 66624.7462209050. The cubic root of 4438856809 is about 1643.4520792379.

The spelling of 4438856809 in words is "four billion, four hundred thirty-eight million, eight hundred fifty-six thousand, eight hundred nine".