1680880816880 has 20 divisors (see below), whose sum is σ = 3908047899432. Its totient is φ = 672352326720.

The previous prime is 1680880816871. The next prime is 1680880816933. The reversal of 1680880816880 is 886180880861.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10505505026 + ... + 10505505185.

Almost surely, 2^{1680880816880} is an apocalyptic number.

1680880816880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1680880816880 is an abundant number, since it is smaller than the sum of its proper divisors (2227167082552).

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

1680880816880 is a wasteful number, since it uses less digits than its factorization.

1680880816880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21011010224 (or 21011010218 counting only the distinct ones).

The product of its (nonzero) digits is 9437184, while the sum is 62.

The spelling of 1680880816880 in words is "one trillion, six hundred eighty billion, eight hundred eighty million, eight hundred sixteen thousand, eight hundred eighty".