12615043202561 has 2 divisors, whose sum is σ = 12615043202562. Its totient is φ = 12615043202560.

The previous prime is 12615043202549. The next prime is 12615043202599. The reversal of 12615043202561 is 16520234051621.

12615043202561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (12615043202599) can be obtained adding 12615043202561 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11676702260161 + 938340942400 = 3417119^2 + 968680^2 .

It is an emirp because it is prime and its reverse (16520234051621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12615043202561 - 2²⁶ = 12614976093697 is a prime.

It is not a weakly prime, because it can be changed into another prime (12615043202761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6307521601280 + 6307521601281.

It is an arithmetic number, because the mean of its divisors is an integer number (6307521601281).

Almost surely, 2^{12615043202561} is an apocalyptic number.

It is an amenable number.

12615043202561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12615043202561 is an equidigital number, since it uses as much as digits as its factorization.

12615043202561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 12615043202561 in words is "twelve trillion, six hundred fifteen billion, forty-three million, two hundred two thousand, five hundred sixty-one".