55216128000 has 960 divisors, whose sum is σ = 215916180480. Its totient is φ = 12386304000.

The previous prime is 55216127987. The next prime is 55216128029. The reversal of 55216128000 is 82161255.

It is a tau number, because it is divible by the number of its divisors (960).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1284095979 + ... + 1284096021.

It is an arithmetic number, because the mean of its divisors is an integer number (224912688).

Almost surely, 2^55216128000 is an apocalyptic number.

55216128000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55216128000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107958090240).

55216128000 is an abundant number, since it is smaller than the sum of its proper divisors (160700052480).

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

55216128000 is a wasteful number, since it uses less digits than its factorization.

55216128000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 55216128000 its reverse (82161255), we get a palindrome (55298289255).

The spelling of 55216128000 in words is "fifty-five billion, two hundred sixteen million, one hundred twenty-eight thousand".