55891218240000 has 4000 divisors, whose sum is σ = 259601256706176. Its totient is φ = 11758141440000.

The previous prime is 55891218239999. The next prime is 55891218240047. The reversal of 55891218240000 is 4281219855.

55891218240000 is a `hidden beast` number, since 5 + 58 + 9 + 12 + 182 + 400 + 0 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (4000).

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

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 399 ways as a sum of consecutive naturals, for example, 63011519557 + ... + 63011520443.

Almost surely, 2^{55891218240000} is an apocalyptic number.

55891218240000 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 55891218240000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129800628353088).

55891218240000 is an abundant number, since it is smaller than the sum of its proper divisors (203710038466176).

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

55891218240000 is a wasteful number, since it uses less digits than its factorization.

55891218240000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978 (or 938 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 45.

Adding to 55891218240000 its reverse (4281219855), we get a palindrome (55895499459855).

The spelling of 55891218240000 in words is "fifty-five trillion, eight hundred ninety-one billion, two hundred eighteen million, two hundred forty thousand".