55438884720 has 480 divisors, whose sum is σ = 203761958400. Its totient is φ = 13470105600.

The previous prime is 55438884701. The next prime is 55438884737. The reversal of 55438884720 is 2748883455.

55438884720 is a `hidden beast` number, since 55 + 43 + 8 + 88 + 472 + 0 = 666.

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 95 ways as a sum of consecutive naturals, for example, 26537436 + ... + 26539524.

It is an arithmetic number, because the mean of its divisors is an integer number (424504080).

Almost surely, 2^55438884720 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 55438884720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101880979200).

55438884720 is an abundant number, since it is smaller than the sum of its proper divisors (148323073680).

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

55438884720 is a wasteful number, since it uses less digits than its factorization.

55438884720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209 (or 2200 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 55438884720 in words is "fifty-five billion, four hundred thirty-eight million, eight hundred eighty-four thousand, seven hundred twenty".