56618855680 has 144 divisors (see below), whose sum is σ = 137116425600. Its totient is φ = 22399082496.

The previous prime is 56618855633. The next prime is 56618855681. The reversal of 56618855680 is 8655881665.

It is a happy number.

56618855680 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 not an unprimeable number, because it can be changed into a prime (56618855681) 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, 58550557 + ... + 58551523.

It is an arithmetic number, because the mean of its divisors is an integer number (952197400).

Almost surely, 2^56618855680 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 56618855680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68558212800).

56618855680 is an abundant number, since it is smaller than the sum of its proper divisors (80497569920).

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

56618855680 is a wasteful number, since it uses less digits than its factorization.

56618855680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 13824000, while the sum is 58.

The spelling of 56618855680 in words is "fifty-six billion, six hundred eighteen million, eight hundred fifty-five thousand, six hundred eighty".