55382171850 has 384 divisors, whose sum is σ = 164656128000. Its totient is φ = 13646880000.

The previous prime is 55382171809. The next prime is 55382171851. The reversal of 55382171850 is 5817128355.

55382171850 is a `hidden beast` number, since 55 + 382 + 171 + 8 + 50 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 55382171796 and 55382171805.

It is not an unprimeable number, because it can be changed into a prime (55382171851) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 305978760 + ... + 305978940.

It is an arithmetic number, because the mean of its divisors is an integer number (428792000).

Almost surely, 2^55382171850 is an apocalyptic number.

55382171850 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 55382171850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82328064000).

55382171850 is an abundant number, since it is smaller than the sum of its proper divisors (109273956150).

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

55382171850 is a wasteful number, since it uses less digits than its factorization.

55382171850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 45.

The spelling of 55382171850 in words is "fifty-five billion, three hundred eighty-two million, one hundred seventy-one thousand, eight hundred fifty".