549159811 has 4 divisors (see below), whose sum is σ = 553484032. Its totient is φ = 544835592.

The previous prime is 549159791. The next prime is 549159817. The reversal of 549159811 is 118951945.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 549159811 - 2¹⁹ = 548635523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (549159817) 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 3 ways as a sum of consecutive naturals, for example, 2161920 + ... + 2162173.

It is an arithmetic number, because the mean of its divisors is an integer number (138371008).

Almost surely, 2^549159811 is an apocalyptic number.

549159811 is a deficient number, since it is larger than the sum of its proper divisors (4324221).

549159811 is a wasteful number, since it uses less digits than its factorization.

549159811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4324220.

The product of its digits is 64800, while the sum is 43.

The square root of 549159811 is about 23434.1590632137. The cubic root of 549159811 is about 818.9038551182.

The spelling of 549159811 in words is "five hundred forty-nine million, one hundred fifty-nine thousand, eight hundred eleven".