55555556056 has 128 divisors (see below), whose sum is σ = 140107968000. Its totient is φ = 19944622080.

The previous prime is 55555556051. The next prime is 55555556087. The reversal of 55555556056 is 65065555555.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 55555555994 and 55555556012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555556051) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4742895 + ... + 4754593.

It is an arithmetic number, because the mean of its divisors is an integer number (1094593500).

Almost surely, 2^55555556056 is an apocalyptic number.

55555556056 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55555556056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70053984000).

55555556056 is an abundant number, since it is smaller than the sum of its proper divisors (84552411944).

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

55555556056 is a wasteful number, since it uses less digits than its factorization.

55555556056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12329 (or 12325 counting only the distinct ones).

The product of its (nonzero) digits is 14062500, while the sum is 52.

The spelling of 55555556056 in words is "fifty-five billion, five hundred fifty-five million, five hundred fifty-six thousand, fifty-six".