1680751920241 has 2 divisors, whose sum is σ = 1680751920242. Its totient is φ = 1680751920240.

The previous prime is 1680751920233. The next prime is 1680751920283. The reversal of 1680751920241 is 1420291570861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1449194630625 + 231557289616 = 1203825^2 + 481204^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680751920241 - 2³ = 1680751920233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1680751920191 and 1680751920200.

It is not a weakly prime, because it can be changed into another prime (1680751920041) 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, 840375960120 + 840375960121.

It is an arithmetic number, because the mean of its divisors is an integer number (840375960121).

Almost surely, 2^{1680751920241} is an apocalyptic number.

It is an amenable number.

1680751920241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680751920241 is an equidigital number, since it uses as much as digits as its factorization.

1680751920241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 1680751920241 in words is "one trillion, six hundred eighty billion, seven hundred fifty-one million, nine hundred twenty thousand, two hundred forty-one".