56781694544 has 80 divisors (see below), whose sum is σ = 115698844800. Its totient is φ = 26944135680.

The previous prime is 56781694523. The next prime is 56781694553. The reversal of 56781694544 is 44549618765.

It is a happy number.

56781694544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33419807 + ... + 33421505.

It is an arithmetic number, because the mean of its divisors is an integer number (1446235560).

Almost surely, 2^56781694544 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 56781694544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57849422400).

56781694544 is an abundant number, since it is smaller than the sum of its proper divisors (58917150256).

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

56781694544 is a wasteful number, since it uses less digits than its factorization.

56781694544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388 (or 2382 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 59.

The spelling of 56781694544 in words is "fifty-six billion, seven hundred eighty-one million, six hundred ninety-four thousand, five hundred forty-four".