1994583128850 has 144 divisors (see below), whose sum is σ = 5805553545792. Its totient is φ = 488034103680.

The previous prime is 1994583128789. The next prime is 1994583128861. The reversal of 1994583128850 is 588213854991.

1994583128850 is a `hidden beast` number, since 1 + 9 + 9 + 458 + 3 + 128 + 8 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 43872 + ... + 1997771.

It is an arithmetic number, because the mean of its divisors is an integer number (40316344068).

Almost surely, 2^{1994583128850} is an apocalyptic number.

1994583128850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1994583128850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2902776772896).

1994583128850 is an abundant number, since it is smaller than the sum of its proper divisors (3810970416942).

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

1994583128850 is a wasteful number, since it uses less digits than its factorization.

1994583128850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2041841 (or 2041833 counting only the distinct ones).

The product of its (nonzero) digits is 24883200, while the sum is 63.

The spelling of 1994583128850 in words is "one trillion, nine hundred ninety-four billion, five hundred eighty-three million, one hundred twenty-eight thousand, eight hundred fifty".