55981094560 has 144 divisors (see below), whose sum is σ = 139853897568. Its totient is φ = 21163645440.

The previous prime is 55981094539. The next prime is 55981094573. The reversal of 55981094560 is 6549018955.

It is a junction number, because it is equal to n+sod(n) for n = 55981094498 and 55981094507.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6607447 + ... + 6615913.

It is an arithmetic number, because the mean of its divisors is an integer number (971207622).

Almost surely, 2^55981094560 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 55981094560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69926948784).

55981094560 is an abundant number, since it is smaller than the sum of its proper divisors (83872803008).

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

55981094560 is a wasteful number, since it uses less digits than its factorization.

55981094560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8587 (or 8548 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 52.

The spelling of 55981094560 in words is "fifty-five billion, nine hundred eighty-one million, ninety-four thousand, five hundred sixty".