549401008128 has 288 divisors, whose sum is σ = 1727913358080. Its totient is φ = 154754826240.

The previous prime is 549401008081. The next prime is 549401008129. The reversal of 549401008128 is 821800104945.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 549401008128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549401008129) 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 23 ways as a sum of consecutive naturals, for example, 21362125 + ... + 21387827.

It is an arithmetic number, because the mean of its divisors is an integer number (5999699160).

Almost surely, 2^549401008128 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 549401008128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (863956679040).

549401008128 is an abundant number, since it is smaller than the sum of its proper divisors (1178512349952).

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

549401008128 is a wasteful number, since it uses less digits than its factorization.

549401008128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25813 (or 25786 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 42.

The spelling of 549401008128 in words is "five hundred forty-nine billion, four hundred one million, eight thousand, one hundred twenty-eight".