1680783901339 has 2 divisors, whose sum is σ = 1680783901340. Its totient is φ = 1680783901338.

The previous prime is 1680783901331. The next prime is 1680783901393. The reversal of 1680783901339 is 9331093870861.

It is a happy number.

Together with next prime (1680783901393) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680783901339 - 2³ = 1680783901331 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680783901331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840391950669 + 840391950670.

It is an arithmetic number, because the mean of its divisors is an integer number (840391950670).

Almost surely, 2^{1680783901339} is an apocalyptic number.

1680783901339 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680783901339 is an equidigital number, since it uses as much as digits as its factorization.

1680783901339 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 58.

The spelling of 1680783901339 in words is "one trillion, six hundred eighty billion, seven hundred eighty-three million, nine hundred one thousand, three hundred thirty-nine".