12400305569 has 2 divisors, whose sum is σ = 12400305570. Its totient is φ = 12400305568.

The previous prime is 12400305503. The next prime is 12400305587. The reversal of 12400305569 is 96550300421.

12400305569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11987403169 + 412902400 = 109487^2 + 20320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12400305569 is a prime.

It is a super-2 number, since 2×12400305569² (a number of 21 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12400305469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200152784 + 6200152785.

It is an arithmetic number, because the mean of its divisors is an integer number (6200152785).

Almost surely, 2^12400305569 is an apocalyptic number.

It is an amenable number.

12400305569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400305569 is an equidigital number, since it uses as much as digits as its factorization.

12400305569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 12400305569 in words is "twelve billion, four hundred million, three hundred five thousand, five hundred sixty-nine".