1680840965446 has 8 divisors (see below), whose sum is σ = 2521298313000. Its totient is φ = 840408194448.

The previous prime is 1680840965413. The next prime is 1680840965483. The reversal of 1680840965446 is 6445690480861.

It is a happy number.

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

It is a super-2 number, since 2×1680840965446² (a number of 25 digits) contains 22 as substring.

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, 5972196 + ... + 6247303.

It is an arithmetic number, because the mean of its divisors is an integer number (315162289125).

Almost surely, 2^{1680840965446} is an apocalyptic number.

1680840965446 is a deficient number, since it is larger than the sum of its proper divisors (840457347554).

1680840965446 is a wasteful number, since it uses less digits than its factorization.

1680840965446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12288278.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 1680840965446 in words is "one trillion, six hundred eighty billion, eight hundred forty million, nine hundred sixty-five thousand, four hundred forty-six".