549858816 has 240 divisors, whose sum is σ = 1747169424. Its totient is φ = 165445632.

The previous prime is 549858779. The next prime is 549858817. The reversal of 549858816 is 618858945.

It is a happy number.

549858816 is a `hidden beast` number, since 5 + 49 + 8 + 588 + 16 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549858817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4013500 + ... + 4013636.

Almost surely, 2^549858816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549858816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (873584712).

549858816 is an abundant number, since it is smaller than the sum of its proper divisors (1197310608).

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

549858816 is a wasteful number, since it uses less digits than its factorization.

549858816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241 (or 222 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 54.

The square root of 549858816 is about 23449.0685529298. The cubic root of 549858816 is about 819.2511585076.

The spelling of 549858816 in words is "five hundred forty-nine million, eight hundred fifty-eight thousand, eight hundred sixteen".