55111122444 has 96 divisors (see below), whose sum is σ = 155665069056. Its totient is φ = 14814351360.

The previous prime is 55111122419. The next prime is 55111122511. The reversal of 55111122444 is 44422111155.

55111122444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a zygodrome in base 10.

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, 5236932 + ... + 5247444.

It is an arithmetic number, because the mean of its divisors is an integer number (1621511136).

Almost surely, 2^55111122444 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 55111122444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77832534528).

55111122444 is an abundant number, since it is smaller than the sum of its proper divisors (100553946612).

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

55111122444 is a wasteful number, since it uses less digits than its factorization.

55111122444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14215 (or 14213 counting only the distinct ones).

The product of its digits is 6400, while the sum is 30.

Adding to 55111122444 its reverse (44422111155), we get a palindrome (99533233599).

The spelling of 55111122444 in words is "fifty-five billion, one hundred eleven million, one hundred twenty-two thousand, four hundred forty-four".