502556116661 has 2 divisors, whose sum is σ = 502556116662. Its totient is φ = 502556116660.

The previous prime is 502556116633. The next prime is 502556116669. The reversal of 502556116661 is 166611655205.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502269864100 + 286252561 = 708710^2 + 16919^2 .

It is a cyclic number.

It is not a de Polignac number, because 502556116661 - 2¹⁰ = 502556115637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502556116669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251278058330 + 251278058331.

It is an arithmetic number, because the mean of its divisors is an integer number (251278058331).

Almost surely, 2^502556116661 is an apocalyptic number.

It is an amenable number.

502556116661 is a deficient number, since it is larger than the sum of its proper divisors (1).

502556116661 is an equidigital number, since it uses as much as digits as its factorization.

502556116661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 502556116661 in words is "five hundred two billion, five hundred fifty-six million, one hundred sixteen thousand, six hundred sixty-one".