7717730648249 has 2 divisors, whose sum is σ = 7717730648250. Its totient is φ = 7717730648248.

The previous prime is 7717730648237. The next prime is 7717730648261. The reversal of 7717730648249 is 9428460377177.

It is a balanced prime because it is at equal distance from previous prime (7717730648237) and next prime (7717730648261).

It can be written as a sum of positive squares in only one way, i.e., 3884671495849 + 3833059152400 = 1970957^2 + 1957820^2 .

It is a cyclic number.

It is not a de Polignac number, because 7717730648249 - 2¹² = 7717730644153 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7717730641249) 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, 3858865324124 + 3858865324125.

It is an arithmetic number, because the mean of its divisors is an integer number (3858865324125).

Almost surely, 2^{7717730648249} is an apocalyptic number.

It is an amenable number.

7717730648249 is a deficient number, since it is larger than the sum of its proper divisors (1).

7717730648249 is an equidigital number, since it uses as much as digits as its factorization.

7717730648249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 99574272, while the sum is 65.

The spelling of 7717730648249 in words is "seven trillion, seven hundred seventeen billion, seven hundred thirty million, six hundred forty-eight thousand, two hundred forty-nine".