6520511613 has 64 divisors (see below), whose sum is σ = 11226138624. Its totient is φ = 3268512000.

The previous prime is 6520511603. The next prime is 6520511671. The reversal of 6520511613 is 3161150256.

It is not a de Polignac number, because 6520511613 - 2¹⁰ = 6520510589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520511603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 742458 + ... + 751188.

It is an arithmetic number, because the mean of its divisors is an integer number (175408416).

Almost surely, 2^6520511613 is an apocalyptic number.

It is an amenable number.

6520511613 is a deficient number, since it is larger than the sum of its proper divisors (4705627011).

6520511613 is a wasteful number, since it uses less digits than its factorization.

6520511613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8866.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 6520511613 is about 80749.6849096020. The cubic root of 6520511613 is about 1868.2165895289.

Adding to 6520511613 its reverse (3161150256), we get a palindrome (9681661869).

The spelling of 6520511613 in words is "six billion, five hundred twenty million, five hundred eleven thousand, six hundred thirteen".