6520859013 has 4 divisors (see below), whose sum is σ = 8694478688. Its totient is φ = 4347239340.

The previous prime is 6520859011. The next prime is 6520859017. The reversal of 6520859013 is 3109580256.

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 not a de Polignac number, because 6520859013 - 2¹ = 6520859011 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 (6520859011) 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, 1086809833 + ... + 1086809838.

It is an arithmetic number, because the mean of its divisors is an integer number (2173619672).

Almost surely, 2^6520859013 is an apocalyptic number.

It is an amenable number.

6520859013 is a deficient number, since it is larger than the sum of its proper divisors (2173619675).

6520859013 is a wasteful number, since it uses less digits than its factorization.

6520859013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2173619674.

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 6520859013 is about 80751.8359729362. The cubic root of 6520859013 is about 1868.2497672382.

The spelling of 6520859013 in words is "six billion, five hundred twenty million, eight hundred fifty-nine thousand, thirteen".