55105100440 has 128 divisors (see below), whose sum is σ = 137694453120. Its totient is φ = 19717632000.

The previous prime is 55105100363. The next prime is 55105100467. The reversal of 55105100440 is 4400150155.

It is a happy number.

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, 3210762 + ... + 3227878.

It is an arithmetic number, because the mean of its divisors is an integer number (1075737915).

Almost surely, 2^55105100440 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 55105100440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68847226560).

55105100440 is an abundant number, since it is smaller than the sum of its proper divisors (82589352680).

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

55105100440 is a wasteful number, since it uses less digits than its factorization.

55105100440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333 (or 17329 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 25.

Adding to 55105100440 its reverse (4400150155), we get a palindrome (59505250595).

The spelling of 55105100440 in words is "fifty-five billion, one hundred five million, one hundred thousand, four hundred forty".