1680920536847 has 2 divisors, whose sum is σ = 1680920536848. Its totient is φ = 1680920536846.

The previous prime is 1680920536817. The next prime is 1680920536901. The reversal of 1680920536847 is 7486350290861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680920536847 - 2⁶ = 1680920536783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1680920536817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840460268423 + 840460268424.

It is an arithmetic number, because the mean of its divisors is an integer number (840460268424).

It is a 1-persistent number, because it is pandigital, but 2⋅1680920536847 = 3361841073694 is not.

Almost surely, 2^{1680920536847} is an apocalyptic number.

1680920536847 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680920536847 is an equidigital number, since it uses as much as digits as its factorization.

1680920536847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17418240, while the sum is 59.

The spelling of 1680920536847 in words is "one trillion, six hundred eighty billion, nine hundred twenty million, five hundred thirty-six thousand, eight hundred forty-seven".