12751252561 has 2 divisors, whose sum is σ = 12751252562. Its totient is φ = 12751252560.

The previous prime is 12751252523. The next prime is 12751252571. The reversal of 12751252561 is 16525215721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12666151936 + 85100625 = 112544^2 + 9225^2 .

It is a cyclic number.

It is not a de Polignac number, because 12751252561 - 2⁷ = 12751252433 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12751252561.

It is not a weakly prime, because it can be changed into another prime (12751252571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6375626280 + 6375626281.

It is an arithmetic number, because the mean of its divisors is an integer number (6375626281).

Almost surely, 2^12751252561 is an apocalyptic number.

It is an amenable number.

12751252561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12751252561 is an equidigital number, since it uses as much as digits as its factorization.

12751252561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 42000, while the sum is 37.

The spelling of 12751252561 in words is "twelve billion, seven hundred fifty-one million, two hundred fifty-two thousand, five hundred sixty-one".