1681216940000 has 120 divisors (see below), whose sum is σ = 4454203917240. Its totient is φ = 620756928000.

The previous prime is 1681216939981. The next prime is 1681216940047. The reversal of 1681216940000 is 496121861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2973110 + ... + 3493109.

It is an arithmetic number, because the mean of its divisors is an integer number (37118365977).

Almost surely, 2^{1681216940000} is an apocalyptic number.

1681216940000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1681216940000 is an abundant number, since it is smaller than the sum of its proper divisors (2772986977240).

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

1681216940000 is an equidigital number, since it uses as much as digits as its factorization.

1681216940000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466262 (or 6466239 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 1681216940000 in words is "one trillion, six hundred eighty-one billion, two hundred sixteen million, nine hundred forty thousand".