502556640689 has 2 divisors, whose sum is σ = 502556640690. Its totient is φ = 502556640688.

The previous prime is 502556640673. The next prime is 502556640713. The reversal of 502556640689 is 986046655205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418693114225 + 83863526464 = 647065^2 + 289592^2 .

It is a cyclic number.

It is not a de Polignac number, because 502556640689 - 2⁴ = 502556640673 is a prime.

It is a super-2 number, since 2×502556640689² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (502556642689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251278320344 + 251278320345.

It is an arithmetic number, because the mean of its divisors is an integer number (251278320345).

Almost surely, 2^502556640689 is an apocalyptic number.

It is an amenable number.

502556640689 is a deficient number, since it is larger than the sum of its proper divisors (1).

502556640689 is an equidigital number, since it uses as much as digits as its factorization.

502556640689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15552000, while the sum is 56.

The spelling of 502556640689 in words is "five hundred two billion, five hundred fifty-six million, six hundred forty thousand, six hundred eighty-nine".