6520116643 has 2 divisors, whose sum is σ = 6520116644. Its totient is φ = 6520116642.

The previous prime is 6520116637. The next prime is 6520116649. The reversal of 6520116643 is 3466110256.

It is a balanced prime because it is at equal distance from previous prime (6520116637) and next prime (6520116649).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6520116643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6520116599 and 6520116608.

It is not a weakly prime, because it can be changed into another prime (6520116649) 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, 3260058321 + 3260058322.

It is an arithmetic number, because the mean of its divisors is an integer number (3260058322).

Almost surely, 2^6520116643 is an apocalyptic number.

6520116643 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520116643 is an equidigital number, since it uses as much as digits as its factorization.

6520116643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 6520116643 is about 80747.2392283476. The cubic root of 6520116643 is about 1868.1788673147.

Adding to 6520116643 its reverse (3466110256), we get a palindrome (9986226899).

The spelling of 6520116643 in words is "six billion, five hundred twenty million, one hundred sixteen thousand, six hundred forty-three".