55120033220544 has 224 divisors, whose sum is σ = 164411580833280. Its totient is φ = 18105018624000.

The previous prime is 55120033220537. The next prime is 55120033220573. The reversal of 55120033220544 is 44502233002155.

55120033220544 is a `hidden beast` number, since 5 + 51 + 200 + 332 + 20 + 54 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 55120033220499 and 55120033220508.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234584719 + ... + 234819569.

Almost surely, 2^{55120033220544} is an apocalyptic number.

55120033220544 is a gapful number since it is divisible by the number (54) 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 55120033220544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82205790416640).

55120033220544 is an abundant number, since it is smaller than the sum of its proper divisors (109291547612736).

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

55120033220544 is a wasteful number, since it uses less digits than its factorization.

55120033220544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236856 (or 236840 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 36.

Adding to 55120033220544 its reverse (44502233002155), we get a palindrome (99622266222699).

The spelling of 55120033220544 in words is "fifty-five trillion, one hundred twenty billion, thirty-three million, two hundred twenty thousand, five hundred forty-four".