550505504509 has 2 divisors, whose sum is σ = 550505504510. Its totient is φ = 550505504508.

The previous prime is 550505504503. The next prime is 550505504519. The reversal of 550505504509 is 905405505055.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 431652942009 + 118852562500 = 657003^2 + 344750^2 .

It is a cyclic number.

It is not a de Polignac number, because 550505504509 - 2¹¹ = 550505502461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (550505504503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275252752254 + 275252752255.

It is an arithmetic number, because the mean of its divisors is an integer number (275252752255).

Almost surely, 2^550505504509 is an apocalyptic number.

It is an amenable number.

550505504509 is a deficient number, since it is larger than the sum of its proper divisors (1).

550505504509 is an equidigital number, since it uses as much as digits as its factorization.

550505504509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 562500, while the sum is 43.

The spelling of 550505504509 in words is "five hundred fifty billion, five hundred five million, five hundred four thousand, five hundred nine".