550516509 has 6 divisors (see below), whose sum is σ = 795190526. Its totient is φ = 367011000.

The previous prime is 550516501. The next prime is 550516537. The reversal of 550516509 is 905615055.

550516509 is a `hidden beast` number, since 550 + 51 + 6 + 50 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 309584025 + 240932484 = 17595^2 + 15522^2 .

It is not a de Polignac number, because 550516509 - 2³ = 550516501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (550516501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 30584242 + ... + 30584259.

Almost surely, 2^550516509 is an apocalyptic number.

It is an amenable number.

550516509 is a deficient number, since it is larger than the sum of its proper divisors (244674017).

550516509 is a wasteful number, since it uses less digits than its factorization.

550516509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61168507 (or 61168504 counting only the distinct ones).

The product of its (nonzero) digits is 33750, while the sum is 36.

The square root of 550516509 is about 23463.0882238464. The cubic root of 550516509 is about 819.5776672107.

The spelling of 550516509 in words is "five hundred fifty million, five hundred sixteen thousand, five hundred nine".