1681317844992 has 120 divisors (see below), whose sum is σ = 5021970653700. Its totient is φ = 560439226368.

The previous prime is 1681317844961. The next prime is 1681317845041. The reversal of 1681317844992 is 2994487131861.

1681317844992 is a `hidden beast` number, since 1 + 6 + 8 + 1 + 31 + 78 + 449 + 92 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4901742 + ... + 5233517.

Almost surely, 2^{1681317844992} is an apocalyptic number.

1681317844992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1681317844992 is an abundant number, since it is smaller than the sum of its proper divisors (3340652808708).

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

1681317844992 is an equidigital number, since it uses as much as digits as its factorization.

1681317844992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10135293 (or 10135264 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The spelling of 1681317844992 in words is "one trillion, six hundred eighty-one billion, three hundred seventeen million, eight hundred forty-four thousand, nine hundred ninety-two".