5641626809 has 12 divisors (see below), whose sum is σ = 7067533284. Its totient is φ = 4463704224.

The previous prime is 5641626799. The next prime is 5641626833. The reversal of 5641626809 is 9086261465.

It can be written as a sum of positive squares in 2 ways, for example, as 3712221184 + 1929405625 = 60928^2 + 43925^2 .

It is a de Polignac number, because none of the positive numbers 2^k-5641626809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5641626209) 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, 4427642 + ... + 4428915.

It is an arithmetic number, because the mean of its divisors is an integer number (588961107).

Almost surely, 2^5641626809 is an apocalyptic number.

It is an amenable number.

5641626809 is a deficient number, since it is larger than the sum of its proper divisors (1425906475).

5641626809 is a wasteful number, since it uses less digits than its factorization.

5641626809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8856584 (or 8856577 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 47.

The square root of 5641626809 is about 75110.7636028286. The cubic root of 5641626809 is about 1780.1972185006.

The spelling of 5641626809 in words is "five billion, six hundred forty-one million, six hundred twenty-six thousand, eight hundred nine".