55607056640 has 72 divisors (see below), whose sum is σ = 133312132800. Its totient is φ = 22223476736.

The previous prime is 55607056607. The next prime is 55607056643. The reversal of 55607056640 is 4665070655.

It is a junction number, because it is equal to n+sod(n) for n = 55607056591 and 55607056600.

It is not an unprimeable number, because it can be changed into a prime (55607056643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1501061 + ... + 1537659.

It is an arithmetic number, because the mean of its divisors is an integer number (1851557400).

Almost surely, 2^55607056640 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 55607056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66656066400).

55607056640 is an abundant number, since it is smaller than the sum of its proper divisors (77705076160).

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

55607056640 is a wasteful number, since it uses less digits than its factorization.

55607056640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37807 (or 37793 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 55607056640 in words is "fifty-five billion, six hundred seven million, fifty-six thousand, six hundred forty".