544681988560 has 80 divisors (see below), whose sum is σ = 1300103073792. Its totient is φ = 212120499200.

The previous prime is 544681988533. The next prime is 544681988561. The reversal of 544681988560 is 65889186445.

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

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 544681988492 and 544681988501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544681988561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 338940 + ... + 1097380.

Almost surely, 2^544681988560 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 544681988560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (650051536896).

544681988560 is an abundant number, since it is smaller than the sum of its proper divisors (755421085232).

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

544681988560 is a wasteful number, since it uses less digits than its factorization.

544681988560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758692 (or 758686 counting only the distinct ones).

The product of its (nonzero) digits is 66355200, while the sum is 64.

The spelling of 544681988560 in words is "five hundred forty-four billion, six hundred eighty-one million, nine hundred eighty-eight thousand, five hundred sixty".