6516116655647 has 2 divisors, whose sum is σ = 6516116655648. Its totient is φ = 6516116655646.

The previous prime is 6516116655577. The next prime is 6516116655661. The reversal of 6516116655647 is 7465566116156.

6516116655647 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516116655647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6516116655847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3258058327823 + 3258058327824.

It is an arithmetic number, because the mean of its divisors is an integer number (3258058327824).

Almost surely, 2^{6516116655647} is an apocalyptic number.

6516116655647 is a deficient number, since it is larger than the sum of its proper divisors (1).

6516116655647 is an equidigital number, since it uses as much as digits as its factorization.

6516116655647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216000, while the sum is 59.

The spelling of 6516116655647 in words is "six trillion, five hundred sixteen billion, one hundred sixteen million, six hundred fifty-five thousand, six hundred forty-seven".