55216401344 has 56 divisors (see below), whose sum is σ = 118108415040. Its totient is φ = 25460757504.

The previous prime is 55216401313. The next prime is 55216401379. The reversal of 55216401344 is 44310461255.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879017 + ... + 939735.

It is an arithmetic number, because the mean of its divisors is an integer number (2109078840).

Almost surely, 2^55216401344 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 55216401344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59054207520).

55216401344 is an abundant number, since it is smaller than the sum of its proper divisors (62892013696).

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

55216401344 is a wasteful number, since it uses less digits than its factorization.

55216401344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61837 (or 61827 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 55216401344 its reverse (44310461255), we get a palindrome (99526862599).

The spelling of 55216401344 in words is "fifty-five billion, two hundred sixteen million, four hundred one thousand, three hundred forty-four".