55555000056 has 192 divisors, whose sum is σ = 161029140480. Its totient is φ = 17270910720.

The previous prime is 55555000051. The next prime is 55555000079. The reversal of 55555000056 is 65000055555.

55555000056 is a `hidden beast` number, since 5 + 55 + 550 + 0 + 0 + 0 + 56 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55555000051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8833345 + ... + 8839631.

It is an arithmetic number, because the mean of its divisors is an integer number (838693440).

Almost surely, 2^55555000056 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 55555000056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80514570240).

55555000056 is an abundant number, since it is smaller than the sum of its proper divisors (105474140424).

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

55555000056 is a wasteful number, since it uses less digits than its factorization.

55555000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6474 (or 6467 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 36.

The spelling of 55555000056 in words is "fifty-five billion, five hundred fifty-five million, fifty-six", and thus it is an aban number.