1680138474793 has 2 divisors, whose sum is σ = 1680138474794. Its totient is φ = 1680138474792.

The previous prime is 1680138474757. The next prime is 1680138474809. The reversal of 1680138474793 is 3974748310861.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1557072221929 + 123066252864 = 1247827^2 + 350808^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680138474793 - 2⁹ = 1680138474281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1680138474293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 840069237396 + 840069237397.

It is an arithmetic number, because the mean of its divisors is an integer number (840069237397).

Almost surely, 2^{1680138474793} is an apocalyptic number.

It is an amenable number.

1680138474793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1680138474793 is an equidigital number, since it uses as much as digits as its factorization.

1680138474793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24385536, while the sum is 61.

The spelling of 1680138474793 in words is "one trillion, six hundred eighty billion, one hundred thirty-eight million, four hundred seventy-four thousand, seven hundred ninety-three".