505045499989 has 2 divisors, whose sum is σ = 505045499990. Its totient is φ = 505045499988.

The previous prime is 505045499963. The next prime is 505045499993. The reversal of 505045499989 is 989994540505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504590019025 + 455480964 = 710345^2 + 21342^2 .

It is a cyclic number.

It is not a de Polignac number, because 505045499989 - 2¹⁷ = 505045368917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505045493989) 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, 252522749994 + 252522749995.

It is an arithmetic number, because the mean of its divisors is an integer number (252522749995).

Almost surely, 2^505045499989 is an apocalyptic number.

It is an amenable number.

505045499989 is a deficient number, since it is larger than the sum of its proper divisors (1).

505045499989 is an equidigital number, since it uses as much as digits as its factorization.

505045499989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976000, while the sum is 67.

The spelling of 505045499989 in words is "five hundred five billion, forty-five million, four hundred ninety-nine thousand, nine hundred eighty-nine".