55111555056 has 80 divisors (see below), whose sum is σ = 146502507168. Its totient is φ = 17839411200.

The previous prime is 55111555001. The next prime is 55111555091. The reversal of 55111555056 is 65055511155.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895516 + ... + 955076.

Almost surely, 2^55111555056 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 55111555056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (73251253584).

55111555056 is an abundant number, since it is smaller than the sum of its proper divisors (91390952112).

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

55111555056 is a wasteful number, since it uses less digits than its factorization.

55111555056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60130 (or 60124 counting only the distinct ones).

The product of its (nonzero) digits is 93750, while the sum is 39.

It can be divided in two parts, 55 and 111555056, that added together give a palindrome (111555111).

The spelling of 55111555056 in words is "fifty-five billion, one hundred eleven million, five hundred fifty-five thousand, fifty-six".