12566035513 has 2 divisors, whose sum is σ = 12566035514. Its totient is φ = 12566035512.

The previous prime is 12566035507. The next prime is 12566035543. The reversal of 12566035513 is 31553066521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11025630009 + 1540405504 = 105003^2 + 39248^2 .

It is an emirp because it is prime and its reverse (31553066521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12566035513 - 2⁵ = 12566035481 is a prime.

It is not a weakly prime, because it can be changed into another prime (12566035543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6283017756 + 6283017757.

It is an arithmetic number, because the mean of its divisors is an integer number (6283017757).

Almost surely, 2^12566035513 is an apocalyptic number.

It is an amenable number.

12566035513 is a deficient number, since it is larger than the sum of its proper divisors (1).

12566035513 is an equidigital number, since it uses as much as digits as its factorization.

12566035513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81000, while the sum is 37.

The spelling of 12566035513 in words is "twelve billion, five hundred sixty-six million, thirty-five thousand, five hundred thirteen".