55181830500 has 192 divisors, whose sum is σ = 182344780800. Its totient is φ = 14401900800.

The previous prime is 55181830477. The next prime is 55181830513. The reversal of 55181830500 is 503818155.

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

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 63 ways as a sum of consecutive naturals, for example, 591016 + ... + 677984.

It is an arithmetic number, because the mean of its divisors is an integer number (949712400).

Almost surely, 2^55181830500 is an apocalyptic number.

55181830500 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 55181830500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91172390400).

55181830500 is an abundant number, since it is smaller than the sum of its proper divisors (127162950300).

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

55181830500 is a wasteful number, since it uses less digits than its factorization.

55181830500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87044 (or 87026 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 36.

The spelling of 55181830500 in words is "fifty-five billion, one hundred eighty-one million, eight hundred thirty thousand, five hundred".