549438555728 has 20 divisors (see below), whose sum is σ = 1068494597460. Its totient is φ = 273698014464.

The previous prime is 549438555719. The next prime is 549438555751. The reversal of 549438555728 is 827555834945.

It can be written as a sum of positive squares in 2 ways, for example, as 173532231184 + 375906324544 = 416572^2 + 613112^2 .

It is a hoax number, since the sum of its digits (65) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63824525 + ... + 63833132.

It is an arithmetic number, because the mean of its divisors is an integer number (53424729873).

Almost surely, 2^549438555728 is an apocalyptic number.

It is an amenable number.

549438555728 is a deficient number, since it is larger than the sum of its proper divisors (519056041732).

549438555728 is a wasteful number, since it uses less digits than its factorization.

549438555728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127657934 (or 127657928 counting only the distinct ones).

The product of its digits is 241920000, while the sum is 65.

The spelling of 549438555728 in words is "five hundred forty-nine billion, four hundred thirty-eight million, five hundred fifty-five thousand, seven hundred twenty-eight".