4394795621809 has 2 divisors, whose sum is σ = 4394795621810. Its totient is φ = 4394795621808.

The previous prime is 4394795621807. The next prime is 4394795621899. The reversal of 4394795621809 is 9081265974934.

4394795621809 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., 4041294028209 + 353501593600 = 2010297^2 + 594560^2 .

It is a cyclic number.

It is not a de Polignac number, because 4394795621809 - 2¹ = 4394795621807 is a prime.

Together with 4394795621807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4394795621807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2197397810904 + 2197397810905.

It is an arithmetic number, because the mean of its divisors is an integer number (2197397810905).

It is a 1-persistent number, because it is pandigital, but 2⋅4394795621809 = 8789591243618 is not.

Almost surely, 2^{4394795621809} is an apocalyptic number.

It is an amenable number.

4394795621809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4394795621809 is an equidigital number, since it uses as much as digits as its factorization.

4394795621809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 117573120, while the sum is 67.

The spelling of 4394795621809 in words is "four trillion, three hundred ninety-four billion, seven hundred ninety-five million, six hundred twenty-one thousand, eight hundred nine".