55004421216 has 24 divisors (see below), whose sum is σ = 144386605944. Its totient is φ = 18334807040.

The previous prime is 55004421211. The next prime is 55004421259. The reversal of 55004421216 is 61212440055.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55004421211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 286481265 + ... + 286481456.

It is an arithmetic number, because the mean of its divisors is an integer number (6016108581).

Almost surely, 2^55004421216 is an apocalyptic number.

It is an amenable number.

55004421216 is an abundant number, since it is smaller than the sum of its proper divisors (89382184728).

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

55004421216 is a wasteful number, since it uses less digits than its factorization.

55004421216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572962734 (or 572962726 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 55004421216 in words is "fifty-five billion, four million, four hundred twenty-one thousand, two hundred sixteen".