1994861481984 has 832 divisors, whose sum is σ = 7058151936000. Its totient is φ = 556250333184.

The previous prime is 1994861481979. The next prime is 1994861482007. The reversal of 1994861481984 is 4891841684991.

1994861481984 is a `hidden beast` number, since 1 + 9 + 9 + 4 + 8 + 61 + 481 + 9 + 84 = 666.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1631120797 + ... + 1631122019.

Almost surely, 2^{1994861481984} is an apocalyptic number.

1994861481984 is a gapful number since it is divisible by the number (14) 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 1994861481984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3529075968000).

1994861481984 is an abundant number, since it is smaller than the sum of its proper divisors (5063290454016).

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

1994861481984 is an equidigital number, since it uses as much as digits as its factorization.

1994861481984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1320 (or 1278 counting only the distinct ones).

The product of its digits is 143327232, while the sum is 72.

The spelling of 1994861481984 in words is "one trillion, nine hundred ninety-four billion, eight hundred sixty-one million, four hundred eighty-one thousand, nine hundred eighty-four".