8247520688129 has 2 divisors, whose sum is σ = 8247520688130. Its totient is φ = 8247520688128.

The previous prime is 8247520688081. The next prime is 8247520688149. The reversal of 8247520688129 is 9218860257428.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4410936649729 + 3836584038400 = 2100223^2 + 1958720^2 .

It is a cyclic number.

It is not a de Polignac number, because 8247520688129 - 2¹² = 8247520684033 is a prime.

It is a super-2 number, since 2×8247520688129² (a number of 27 digits) contains 22 as substring.

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 (8247520688149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4123760344064 + 4123760344065.

It is an arithmetic number, because the mean of its divisors is an integer number (4123760344065).

Almost surely, 2^{8247520688129} is an apocalyptic number.

It is an amenable number.

8247520688129 is a deficient number, since it is larger than the sum of its proper divisors (1).

8247520688129 is an equidigital number, since it uses as much as digits as its factorization.

8247520688129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30965760, while the sum is 62.

The spelling of 8247520688129 in words is "eight trillion, two hundred forty-seven billion, five hundred twenty million, six hundred eighty-eight thousand, one hundred twenty-nine".