549549945 has 36 divisors (see below), whose sum is σ = 1108076580. Its totient is φ = 251221824.

The previous prime is 549549941. The next prime is 549549947. The reversal of 549549945 is 549945945.

549549945 is a `hidden beast` number, since 5 + 4 + 9 + 549 + 94 + 5 = 666.

549549945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 407272761 + 142277184 = 20181^2 + 11928^2 .

It is not a de Polignac number, because 549549945 - 2² = 549549941 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 549549891 and 549549900.

It is not an unprimeable number, because it can be changed into a prime (549549941) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 122410 + ... + 126819.

It is an arithmetic number, because the mean of its divisors is an integer number (30779905).

Almost surely, 2^549549945 is an apocalyptic number.

It is an amenable number.

549549945 is an abundant number, since it is smaller than the sum of its proper divisors (558526635).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

549549945 is a wasteful number, since it uses less digits than its factorization.

549549945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249254 (or 249244 counting only the distinct ones).

The product of its digits is 5832000, while the sum is 54.

The square root of 549549945 is about 23442.4816305783. The cubic root of 549549945 is about 819.0977310504.

The spelling of 549549945 in words is "five hundred forty-nine million, five hundred forty-nine thousand, nine hundred forty-five".