55183057920 has 440 divisors, whose sum is σ = 198878790528. Its totient is φ = 14631321600.

The previous prime is 55183057823. The next prime is 55183057921. The reversal of 55183057920 is 2975038155.

55183057920 is a `hidden beast` number, since 5 + 51 + 8 + 3 + 0 + 579 + 20 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (55183057921) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 112388875 + ... + 112389365.

Almost surely, 2^55183057920 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 55183057920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99439395264).

55183057920 is an abundant number, since it is smaller than the sum of its proper divisors (143695732608).

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

55183057920 is a wasteful number, since it uses less digits than its factorization.

55183057920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 799 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 55183057920 in words is "fifty-five billion, one hundred eighty-three million, fifty-seven thousand, nine hundred twenty".