12256617017 has 2 divisors, whose sum is σ = 12256617018. Its totient is φ = 12256617016.

The previous prime is 12256617011. The next prime is 12256617031. The reversal of 12256617017 is 71071665221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12250947856 + 5669161 = 110684^2 + 2381^2 .

It is a cyclic number.

It is not a de Polignac number, because 12256617017 - 2¹⁰ = 12256615993 is a prime.

It is not a weakly prime, because it can be changed into another prime (12256617011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6128308508 + 6128308509.

It is an arithmetic number, because the mean of its divisors is an integer number (6128308509).

Almost surely, 2^12256617017 is an apocalyptic number.

It is an amenable number.

12256617017 is a deficient number, since it is larger than the sum of its proper divisors (1).

12256617017 is an equidigital number, since it uses as much as digits as its factorization.

12256617017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 12256617017 in words is "twelve billion, two hundred fifty-six million, six hundred seventeen thousand, seventeen".