6516161116511 has 4 divisors (see below), whose sum is σ = 6542121918024. Its totient is φ = 6490200315000.

The previous prime is 6516161116469. The next prime is 6516161116571. The reversal of 6516161116511 is 1156111616156.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6516161116511 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 (6516161116571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12980400380 + ... + 12980400881.

It is an arithmetic number, because the mean of its divisors is an integer number (1635530479506).

Almost surely, 2^{6516161116511} is an apocalyptic number.

6516161116511 is a deficient number, since it is larger than the sum of its proper divisors (25960801513).

6516161116511 is a wasteful number, since it uses less digits than its factorization.

6516161116511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25960801512.

The product of its digits is 32400, while the sum is 41.

The spelling of 6516161116511 in words is "six trillion, five hundred sixteen billion, one hundred sixty-one million, one hundred sixteen thousand, five hundred eleven".