6504813013 has 16 divisors (see below), whose sum is σ = 6886393200. Its totient is φ = 6134768640.

The previous prime is 6504812999. The next prime is 6504813053. The reversal of 6504813013 is 3103184056.

It can be written as a sum of positive squares in 8 ways, for example, as 2454508849 + 4050304164 = 49543^2 + 63642^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6504813013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6504813053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342733 + ... + 361213.

It is an arithmetic number, because the mean of its divisors is an integer number (430399575).

Almost surely, 2^6504813013 is an apocalyptic number.

It is an amenable number.

6504813013 is a deficient number, since it is larger than the sum of its proper divisors (381580187).

6504813013 is a wasteful number, since it uses less digits than its factorization.

6504813013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18792.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 6504813013 is about 80652.4209990004. The cubic root of 6504813013 is about 1866.7160961649.

Adding to 6504813013 its reverse (3103184056), we get a palindrome (9607997069).

The spelling of 6504813013 in words is "six billion, five hundred four million, eight hundred thirteen thousand, thirteen".