543320661040 has 80 divisors (see below), whose sum is σ = 1296627948000. Its totient is φ = 211602032640.

The previous prime is 543320660989. The next prime is 543320661083. The reversal of 543320661040 is 40166023345.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 543320660987 and 543320661005.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1470742 + ... + 1802698.

It is an arithmetic number, because the mean of its divisors is an integer number (16207849350).

Almost surely, 2^543320661040 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 543320661040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648313974000).

543320661040 is an abundant number, since it is smaller than the sum of its proper divisors (753307286960).

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

543320661040 is a wasteful number, since it uses less digits than its factorization.

543320661040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332510 (or 332504 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 543320661040 its reverse (40166023345), we get a palindrome (583486684385).

The spelling of 543320661040 in words is "five hundred forty-three billion, three hundred twenty million, six hundred sixty-one thousand, forty".