4644969809 has 2 divisors, whose sum is σ = 4644969810. Its totient is φ = 4644969808.

The previous prime is 4644969757. The next prime is 4644969821. The reversal of 4644969809 is 9089694464.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4640334400 + 4635409 = 68120^2 + 2153^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4644969809 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4644969409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2322484904 + 2322484905.

It is an arithmetic number, because the mean of its divisors is an integer number (2322484905).

Almost surely, 2^4644969809 is an apocalyptic number.

It is an amenable number.

4644969809 is a deficient number, since it is larger than the sum of its proper divisors (1).

4644969809 is an equidigital number, since it uses as much as digits as its factorization.

4644969809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13436928, while the sum is 59.

The square root of 4644969809 is about 68154.0153549297. The cubic root of 4644969809 is about 1668.5054587512.

The spelling of 4644969809 in words is "four billion, six hundred forty-four million, nine hundred sixty-nine thousand, eight hundred nine".