12442535761 has 2 divisors, whose sum is σ = 12442535762. Its totient is φ = 12442535760.

The previous prime is 12442535747. The next prime is 12442535779. The reversal of 12442535761 is 16753524421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9796050625 + 2646485136 = 98975^2 + 51444^2 .

It is a cyclic number.

It is not a de Polignac number, because 12442535761 - 2⁹ = 12442535249 is a prime.

It is not a weakly prime, because it can be changed into another prime (12442535711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6221267880 + 6221267881.

It is an arithmetic number, because the mean of its divisors is an integer number (6221267881).

Almost surely, 2^12442535761 is an apocalyptic number.

It is an amenable number.

12442535761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12442535761 is an equidigital number, since it uses as much as digits as its factorization.

12442535761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 40.

The spelling of 12442535761 in words is "twelve billion, four hundred forty-two million, five hundred thirty-five thousand, seven hundred sixty-one".