1994573457792 has 192 divisors, whose sum is σ = 5810020164000. Its totient is φ = 656715079680.

The previous prime is 1994573457749. The next prime is 1994573457839. The reversal of 1994573457792 is 2977543754991.

1994573457792 is a `hidden beast` number, since 1 + 9 + 9 + 4 + 573 + 45 + 7 + 7 + 9 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a self number, because there is not a number n which added to its sum of digits gives 1994573457792.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 105696934 + ... + 105715802.

Almost surely, 2^{1994573457792} is an apocalyptic number.

1994573457792 is a gapful number since it is divisible by the number (12) 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 1994573457792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2905010082000).

1994573457792 is an abundant number, since it is smaller than the sum of its proper divisors (3815446706208).

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

1994573457792 is a wasteful number, since it uses less digits than its factorization.

1994573457792 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009 (or 19994 counting only the distinct ones).

The product of its digits is 600112800, while the sum is 72.

The spelling of 1994573457792 in words is "one trillion, nine hundred ninety-four billion, five hundred seventy-three million, four hundred fifty-seven thousand, seven hundred ninety-two".