55489420056 has 48 divisors (see below), whose sum is σ = 161372296440. Its totient is φ = 15854119680.

The previous prime is 55489420043. The next prime is 55489420087. The reversal of 55489420056 is 65002498455.

It is a junction number, because it is equal to n+sod(n) for n = 55489419987 and 55489420014.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23591265 + ... + 23593616.

Almost surely, 2^55489420056 is an apocalyptic number.

55489420056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55489420056 is an abundant number, since it is smaller than the sum of its proper divisors (105882876384).

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

55489420056 is a wasteful number, since it uses less digits than its factorization.

55489420056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47184904 (or 47184893 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 48.

The spelling of 55489420056 in words is "fifty-five billion, four hundred eighty-nine million, four hundred twenty thousand, fifty-six".