1681980169824 has 72 divisors (see below), whose sum is σ = 5034874866840. Its totient is φ = 531151630848.

The previous prime is 1681980169819. The next prime is 1681980169853. The reversal of 1681980169824 is 4289610891861.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 153684237 + ... + 153695180.

It is an arithmetic number, because the mean of its divisors is an integer number (69928817595).

Almost surely, 2^{1681980169824} is an apocalyptic number.

It is an amenable number.

1681980169824 is an abundant number, since it is smaller than the sum of its proper divisors (3352894697016).

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

1681980169824 is a wasteful number, since it uses less digits than its factorization.

1681980169824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307379452 (or 307379441 counting only the distinct ones).

The product of its (nonzero) digits is 11943936, while the sum is 63.

The spelling of 1681980169824 in words is "one trillion, six hundred eighty-one billion, nine hundred eighty million, one hundred sixty-nine thousand, eight hundred twenty-four".