55000000056 has 128 divisors (see below), whose sum is σ = 146102564160. Its totient is φ = 17229312000.

The previous prime is 55000000039. The next prime is 55000000087. The reversal of 55000000056 is 65000000055.

It is a junction number, because it is equal to n+sod(n) for n = 54999999969 and 55000000041.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3669730 + ... + 3684686.

Almost surely, 2^55000000056 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 55000000056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73051282080).

55000000056 is an abundant number, since it is smaller than the sum of its proper divisors (91102564104).

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

55000000056 is a wasteful number, since it uses less digits than its factorization.

55000000056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15145 (or 15141 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

Subtracting 55000000056 from its reverse (65000000055), we obtain a palindrome (9999999999).

The spelling of 55000000056 in words is "fifty-five billion, fifty-six", and thus it is an aban number and an uban number.