7971830846689 has 2 divisors, whose sum is σ = 7971830846690. Its totient is φ = 7971830846688.

The previous prime is 7971830846663. The next prime is 7971830846699. The reversal of 7971830846689 is 9866480381797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6393352706064 + 1578478140625 = 2528508^2 + 1256375^2 .

It is a cyclic number.

It is not a de Polignac number, because 7971830846689 - 2²⁵ = 7971797292257 is a prime.

It is not a weakly prime, because it can be changed into another prime (7971830846699) 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, 3985915423344 + 3985915423345.

It is an arithmetic number, because the mean of its divisors is an integer number (3985915423345).

Almost surely, 2^{7971830846689} is an apocalyptic number.

It is an amenable number.

7971830846689 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971830846689 is an equidigital number, since it uses as much as digits as its factorization.

7971830846689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 877879296, while the sum is 76.

The spelling of 7971830846689 in words is "seven trillion, nine hundred seventy-one billion, eight hundred thirty million, eight hundred forty-six thousand, six hundred eighty-nine".