549564865 has 8 divisors (see below), whose sum is σ = 698270760. Its totient is φ = 413789952.

The previous prime is 549564863. The next prime is 549564871. The reversal of 549564865 is 568465945.

It can be written as a sum of positive squares in 4 ways, for example, as 283450896 + 266113969 = 16836^2 + 16313^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 549564865 - 2¹ = 549564863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (549564863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3232650 + ... + 3232819.

It is an arithmetic number, because the mean of its divisors is an integer number (87283845).

Almost surely, 2^549564865 is an apocalyptic number.

It is an amenable number.

549564865 is a deficient number, since it is larger than the sum of its proper divisors (148705895).

549564865 is a wasteful number, since it uses less digits than its factorization.

549564865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6465491.

The product of its digits is 5184000, while the sum is 52.

The square root of 549564865 is about 23442.7998541130. The cubic root of 549564865 is about 819.1051436782.

The spelling of 549564865 in words is "five hundred forty-nine million, five hundred sixty-four thousand, eight hundred sixty-five".