1681328716 has 6 divisors (see below), whose sum is σ = 2942325260. Its totient is φ = 840664356.

The previous prime is 1681328711. The next prime is 1681328731. The reversal of 1681328716 is 6178231861.

It is not an unprimeable number, because it can be changed into a prime (1681328711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210166086 + ... + 210166093.

Almost surely, 2^1681328716 is an apocalyptic number.

It is an amenable number.

1681328716 is a deficient number, since it is larger than the sum of its proper divisors (1260996544).

1681328716 is a wasteful number, since it uses less digits than its factorization.

1681328716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420332183 (or 420332181 counting only the distinct ones).

The product of its digits is 96768, while the sum is 43.

The square root of 1681328716 is about 41004.0085357517. The cubic root of 1681328716 is about 1189.0977120999.

The spelling of 1681328716 in words is "one billion, six hundred eighty-one million, three hundred twenty-eight thousand, seven hundred sixteen".