55505289216 has 256 divisors, whose sum is σ = 160964445600. Its totient is φ = 17012097024.

The previous prime is 55505289211. The next prime is 55505289223. The reversal of 55505289216 is 61298250555.

It is a tau number, because it is divible by the number of its divisors (256).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55505289211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215973760 + ... + 215974016.

Almost surely, 2^55505289216 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 55505289216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80482222800).

55505289216 is an abundant number, since it is smaller than the sum of its proper divisors (105459156384).

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

55505289216 is an frugal number, since it uses more digits than its factorization.

55505289216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329 (or 275 counting only the distinct ones).

The product of its (nonzero) digits is 1080000, while the sum is 48.

The spelling of 55505289216 in words is "fifty-five billion, five hundred five million, two hundred eighty-nine thousand, two hundred sixteen".