111551100450 has 96 divisors (see below), whose sum is σ = 292514611200. Its totient is φ = 28054797120.

The previous prime is 111551100373. The next prime is 111551100457. The reversal of 111551100450 is 54001155111.

111551100450 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 111551100450.

It is not an unprimeable number, because it can be changed into a prime (111551100457) 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, 547791 + ... + 723309.

It is an arithmetic number, because the mean of its divisors is an integer number (3047027200).

Almost surely, 2^111551100450 is an apocalyptic number.

111551100450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 111551100450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146257305600).

111551100450 is an abundant number, since it is smaller than the sum of its proper divisors (180963510750).

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

111551100450 is a wasteful number, since it uses less digits than its factorization.

111551100450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175776 (or 175771 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 24.

Adding to 111551100450 its reverse (54001155111), we get a palindrome (165552255561).

The spelling of 111551100450 in words is "one hundred eleven billion, five hundred fifty-one million, one hundred thousand, four hundred fifty".