55561107856 has 40 divisors (see below), whose sum is σ = 108220851200. Its totient is φ = 27633415680.

The previous prime is 55561107851. The next prime is 55561107881. The reversal of 55561107856 is 65870116555.

It is not an unprimeable number, because it can be changed into a prime (55561107851) 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, 3535825 + ... + 3551503.

It is an arithmetic number, because the mean of its divisors is an integer number (2705521280).

Almost surely, 2^55561107856 is an apocalyptic number.

It is an amenable number.

55561107856 is a deficient number, since it is larger than the sum of its proper divisors (52659743344).

55561107856 is a wasteful number, since it uses less digits than its factorization.

55561107856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16847 (or 16841 counting only the distinct ones).

The product of its (nonzero) digits is 1260000, while the sum is 49.

The spelling of 55561107856 in words is "fifty-five billion, five hundred sixty-one million, one hundred seven thousand, eight hundred fifty-six".