1680723058787 has 2 divisors, whose sum is σ = 1680723058788. Its totient is φ = 1680723058786.

The previous prime is 1680723058759. The next prime is 1680723058829. The reversal of 1680723058787 is 7878503270861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1680723058787 - 2¹⁶ = 1680722993251 is a prime.

It is a super-2 number, since 2×1680723058787² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1680723058187) 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, 840361529393 + 840361529394.

It is an arithmetic number, because the mean of its divisors is an integer number (840361529394).

Almost surely, 2^{1680723058787} is an apocalyptic number.

1680723058787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680723058787 is an equidigital number, since it uses as much as digits as its factorization.

1680723058787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31610880, while the sum is 62.

The spelling of 1680723058787 in words is "one trillion, six hundred eighty billion, seven hundred twenty-three million, fifty-eight thousand, seven hundred eighty-seven".