549051138 has 24 divisors (see below), whose sum is σ = 1196493948. Its totient is φ = 181958112.

The previous prime is 549051121. The next prime is 549051157. The reversal of 549051138 is 831150945.

549051138 is a `hidden beast` number, since 54 + 90 + 511 + 3 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 455096889 + 93954249 = 21333^2 + 9693^2 .

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 85045 + ... + 91272.

Almost surely, 2^549051138 is an apocalyptic number.

549051138 is an abundant number, since it is smaller than the sum of its proper divisors (647442810).

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

549051138 is a wasteful number, since it uses less digits than its factorization.

549051138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176498 (or 176495 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 549051138 is about 23431.8402606368. The cubic root of 549051138 is about 818.8498340435.

The spelling of 549051138 in words is "five hundred forty-nine million, fifty-one thousand, one hundred thirty-eight".