12513556261 has 2 divisors, whose sum is σ = 12513556262. Its totient is φ = 12513556260.

The previous prime is 12513556243. The next prime is 12513556283. The reversal of 12513556261 is 16265531521.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12364105636 + 149450625 = 111194^2 + 12225^2 .

It is a cyclic number.

It is not a de Polignac number, because 12513556261 - 2¹⁵ = 12513523493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12513556261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12513556201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256778130 + 6256778131.

It is an arithmetic number, because the mean of its divisors is an integer number (6256778131).

Almost surely, 2^12513556261 is an apocalyptic number.

It is an amenable number.

12513556261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513556261 is an equidigital number, since it uses as much as digits as its factorization.

12513556261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 37.

The spelling of 12513556261 in words is "twelve billion, five hundred thirteen million, five hundred fifty-six thousand, two hundred sixty-one".