516561441554646 has 24 divisors (see below), whose sum is σ = 1119749670912600. Its totient is φ = 172105114229376.

The previous prime is 516561441554581. The next prime is 516561441554701. The reversal of 516561441554646 is 646455144165615.

516561441554646 is a `hidden beast` number, since 5 + 1 + 6 + 5 + 6 + 1 + 4 + 41 + 5 + 546 + 46 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6836040795 + ... + 6836116358.

It is an arithmetic number, because the mean of its divisors is an integer number (46656236288025).

Almost surely, 2^{516561441554646} is an apocalyptic number.

516561441554646 is an abundant number, since it is smaller than the sum of its proper divisors (603188229357954).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

516561441554646 is a wasteful number, since it uses less digits than its factorization.

516561441554646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13672159260 (or 13672159257 counting only the distinct ones).

The product of its digits is 207360000, while the sum is 63.

The spelling of 516561441554646 in words is "five hundred sixteen trillion, five hundred sixty-one billion, four hundred forty-one million, five hundred fifty-four thousand, six hundred forty-six".