5644921781760 has 160 divisors (see below), whose sum is σ = 18058330791072. Its totient is φ = 1504293027840.

The previous prime is 5644921781749. The next prime is 5644921781789. The reversal of 5644921781760 is 671871294465.

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a junction number, because it is equal to n+sod(n) for n = 5644921781694 and 5644921781703.

It is a congruent number.

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, 11125932 + ... + 11622228.

Almost surely, 2^{5644921781760} 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 5644921781760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9029165395536).

5644921781760 is an abundant number, since it is smaller than the sum of its proper divisors (12413409009312).

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

5644921781760 is a wasteful number, since it uses less digits than its factorization.

5644921781760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497804 (or 497788 counting only the distinct ones).

The product of its (nonzero) digits is 20321280, while the sum is 60.

The spelling of 5644921781760 in words is "five trillion, six hundred forty-four billion, nine hundred twenty-one million, seven hundred eighty-one thousand, seven hundred sixty".