6559490209 has 4 divisors (see below), whose sum is σ = 6559824304. Its totient is φ = 6559156116.

The previous prime is 6559490143. The next prime is 6559490233. The reversal of 6559490209 is 9020949556.

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 not a de Polignac number, because 6559490209 - 2⁹ = 6559489697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6559490279) 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, 135627 + ... + 177520.

It is an arithmetic number, because the mean of its divisors is an integer number (1639956076).

Almost surely, 2^6559490209 is an apocalyptic number.

It is an amenable number.

6559490209 is a deficient number, since it is larger than the sum of its proper divisors (334095).

6559490209 is a wasteful number, since it uses less digits than its factorization.

6559490209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334094.

The product of its (nonzero) digits is 874800, while the sum is 49.

The square root of 6559490209 is about 80990.6797662546. The cubic root of 6559490209 is about 1871.9318315671.

The spelling of 6559490209 in words is "six billion, five hundred fifty-nine million, four hundred ninety thousand, two hundred nine".