5644644785 has 12 divisors (see below), whose sum is σ = 7334699292. Its totient is φ = 4168352448.

The previous prime is 5644644763. The next prime is 5644644791. The reversal of 5644644785 is 5874464465.

It can be written as a sum of positive squares in 6 ways, for example, as 793661584 + 4850983201 = 28172^2 + 69649^2 .

It is not a de Polignac number, because 5644644785 - 2¹⁰ = 5644643761 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3339182 + ... + 3340871.

It is an arithmetic number, because the mean of its divisors is an integer number (611224941).

Almost surely, 2^5644644785 is an apocalyptic number.

It is an amenable number.

5644644785 is a deficient number, since it is larger than the sum of its proper divisors (1690054507).

5644644785 is a wasteful number, since it uses less digits than its factorization.

5644644785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6680084 (or 6680071 counting only the distinct ones).

The product of its digits is 12902400, while the sum is 53.

The square root of 5644644785 is about 75130.8510866209. The cubic root of 5644644785 is about 1780.5145994576.

The spelling of 5644644785 in words is "five billion, six hundred forty-four million, six hundred forty-four thousand, seven hundred eighty-five".