550575809 has 12 divisors (see below), whose sum is σ = 641135088. Its totient is φ = 471429000.

The previous prime is 550575793. The next prime is 550575811. The reversal of 550575809 is 908575055.

It is not a de Polignac number, because 550575809 - 2⁴ = 550575793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 550575809.

It is not an unprimeable number, because it can be changed into a prime (550575859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46154 + ... + 56844.

It is an arithmetic number, because the mean of its divisors is an integer number (53427924).

Almost surely, 2^550575809 is an apocalyptic number.

It is an amenable number.

550575809 is a deficient number, since it is larger than the sum of its proper divisors (90559279).

550575809 is a wasteful number, since it uses less digits than its factorization.

550575809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11756 (or 11749 counting only the distinct ones).

The product of its (nonzero) digits is 315000, while the sum is 44.

The square root of 550575809 is about 23464.3518768365. The cubic root of 550575809 is about 819.6070936432.

The spelling of 550575809 in words is "five hundred fifty million, five hundred seventy-five thousand, eight hundred nine".