5638577309 has 4 divisors (see below), whose sum is σ = 5639784000. Its totient is φ = 5637370620.

The previous prime is 5638577281. The next prime is 5638577327. The reversal of 5638577309 is 9037758365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5638577309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638573309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596309 + ... + 605690.

It is an arithmetic number, because the mean of its divisors is an integer number (1409946000).

Almost surely, 2^5638577309 is an apocalyptic number.

It is an amenable number.

5638577309 is a deficient number, since it is larger than the sum of its proper divisors (1206691).

5638577309 is a wasteful number, since it uses less digits than its factorization.

5638577309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206690.

The product of its (nonzero) digits is 4762800, while the sum is 53.

The square root of 5638577309 is about 75090.4608389108. The cubic root of 5638577309 is about 1779.8764073805.

The spelling of 5638577309 in words is "five billion, six hundred thirty-eight million, five hundred seventy-seven thousand, three hundred nine".