549338785920 has 1536 divisors, whose sum is σ = 2213422848000. Its totient is φ = 129543929856.

The previous prime is 549338785889. The next prime is 549338785921. The reversal of 549338785920 is 29587833945.

549338785920 is a `hidden beast` number, since 5 + 4 + 9 + 3 + 38 + 7 + 8 + 592 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (549338785921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4009772092 + ... + 4009772228.

It is an arithmetic number, because the mean of its divisors is an integer number (1441030500).

Almost surely, 2^549338785920 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 549338785920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1106711424000).

549338785920 is an abundant number, since it is smaller than the sum of its proper divisors (1664084062080).

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

549338785920 is a wasteful number, since it uses less digits than its factorization.

549338785920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272 (or 248 counting only the distinct ones).

The product of its (nonzero) digits is 65318400, while the sum is 63.

The spelling of 549338785920 in words is "five hundred forty-nine billion, three hundred thirty-eight million, seven hundred eighty-five thousand, nine hundred twenty".