1680689916069 has 8 divisors (see below), whose sum is σ = 2242618847040. Its totient is φ = 1119610464576.

The previous prime is 1680689916067. The next prime is 1680689916079. The reversal of 1680689916069 is 9606199860861.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1680689916069 - 2¹ = 1680689916067 is a prime.

It is a super-2 number, since 2×1680689916069² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1680689915994 and 1680689916012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680689916067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212365252 + ... + 212373165.

It is an arithmetic number, because the mean of its divisors is an integer number (280327355880).

Almost surely, 2^{1680689916069} is an apocalyptic number.

It is an amenable number.

1680689916069 is a deficient number, since it is larger than the sum of its proper divisors (561928930971).

1680689916069 is a wasteful number, since it uses less digits than its factorization.

1680689916069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424739739.

The product of its (nonzero) digits is 60466176, while the sum is 69.

The spelling of 1680689916069 in words is "one trillion, six hundred eighty billion, six hundred eighty-nine million, nine hundred sixteen thousand, sixty-nine".