55438840800 has 576 divisors, whose sum is σ = 229995279360. Its totient is φ = 12624906240.

The previous prime is 55438840789. The next prime is 55438840817. The reversal of 55438840800 is 804883455.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 56397109 + ... + 56398091.

It is an arithmetic number, because the mean of its divisors is an integer number (399297360).

Almost surely, 2^55438840800 is an apocalyptic number.

55438840800 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 55438840800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114997639680).

55438840800 is an abundant number, since it is smaller than the sum of its proper divisors (174556438560).

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

55438840800 is a wasteful number, since it uses less digits than its factorization.

55438840800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392 (or 1373 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 55438840800 in words is "fifty-five billion, four hundred thirty-eight million, eight hundred forty thousand, eight hundred".