55305782850 has 96 divisors (see below), whose sum is σ = 139597136640. Its totient is φ = 14486386240.

The previous prime is 55305782843. The next prime is 55305782897. The reversal of 55305782850 is 5828750355.

It is a self number, because there is not a number n which added to its sum of digits gives 55305782850.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17937409 + ... + 17940491.

It is an arithmetic number, because the mean of its divisors is an integer number (1454136840).

Almost surely, 2^55305782850 is an apocalyptic number.

55305782850 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 55305782850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69798568320).

55305782850 is an abundant number, since it is smaller than the sum of its proper divisors (84291353790).

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

55305782850 is a wasteful number, since it uses less digits than its factorization.

55305782850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5184 (or 5179 counting only the distinct ones).

The product of its (nonzero) digits is 1680000, while the sum is 48.

The spelling of 55305782850 in words is "fifty-five billion, three hundred five million, seven hundred eighty-two thousand, eight hundred fifty".