505555560089 has 2 divisors, whose sum is σ = 505555560090. Its totient is φ = 505555560088.

The previous prime is 505555560053. The next prime is 505555560131. The reversal of 505555560089 is 980065555505.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 469382563225 + 36172996864 = 685115^2 + 190192^2 .

It is a cyclic number.

It is not a de Polignac number, because 505555560089 - 2⁸ = 505555559833 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505555560089.

It is not a weakly prime, because it can be changed into another prime (505555760089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252777780044 + 252777780045.

It is an arithmetic number, because the mean of its divisors is an integer number (252777780045).

Almost surely, 2^505555560089 is an apocalyptic number.

It is an amenable number.

505555560089 is a deficient number, since it is larger than the sum of its proper divisors (1).

505555560089 is an equidigital number, since it uses as much as digits as its factorization.

505555560089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750000, while the sum is 53.

The spelling of 505555560089 in words is "five hundred five billion, five hundred fifty-five million, five hundred sixty thousand, eighty-nine".