5642502809 has 2 divisors, whose sum is σ = 5642502810. Its totient is φ = 5642502808.

The previous prime is 5642502791. The next prime is 5642502839. The reversal of 5642502809 is 9082052465.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4820247184 + 822255625 = 69428^2 + 28675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5642502809 is a prime.

It is not a weakly prime, because it can be changed into another prime (5642502839) 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 as a sum of consecutive naturals, namely, 2821251404 + 2821251405.

It is an arithmetic number, because the mean of its divisors is an integer number (2821251405).

Almost surely, 2^5642502809 is an apocalyptic number.

It is an amenable number.

5642502809 is a deficient number, since it is larger than the sum of its proper divisors (1).

5642502809 is an equidigital number, since it uses as much as digits as its factorization.

5642502809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 5642502809 is about 75116.5947644061. The cubic root of 5642502809 is about 1780.2893533942.

The spelling of 5642502809 in words is "five billion, six hundred forty-two million, five hundred two thousand, eight hundred nine".