55556111112 has 128 divisors (see below), whose sum is σ = 158401267200. Its totient is φ = 16127935488.

The previous prime is 55556111111. The next prime is 55556111147. The reversal of 55556111112 is 21111165555.

It is not an unprimeable number, because it can be changed into a prime (55556111111) 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, 250003 + ... + 416669.

It is an arithmetic number, because the mean of its divisors is an integer number (1237509900).

Almost surely, 2^55556111112 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 55556111112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79200633600).

55556111112 is an abundant number, since it is smaller than the sum of its proper divisors (102845156088).

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

55556111112 is a wasteful number, since it uses less digits than its factorization.

55556111112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166755 (or 166751 counting only the distinct ones).

The product of its digits is 7500, while the sum is 33.

Adding to 55556111112 its reverse (21111165555), we get a palindrome (76667276667).

The spelling of 55556111112 in words is "fifty-five billion, five hundred fifty-six million, one hundred eleven thousand, one hundred twelve".