12260816809 has 2 divisors, whose sum is σ = 12260816810. Its totient is φ = 12260816808.

The previous prime is 12260816807. The next prime is 12260816849. The reversal of 12260816809 is 90861806221.

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., 11496128400 + 764688409 = 107220^2 + 27653^2 .

It is a cyclic number.

It is not a de Polignac number, because 12260816809 - 2¹ = 12260816807 is a prime.

Together with 12260816807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12260816801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130408404 + 6130408405.

It is an arithmetic number, because the mean of its divisors is an integer number (6130408405).

Almost surely, 2^12260816809 is an apocalyptic number.

It is an amenable number.

12260816809 is a deficient number, since it is larger than the sum of its proper divisors (1).

12260816809 is an equidigital number, since it uses as much as digits as its factorization.

12260816809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82944, while the sum is 43.

The spelling of 12260816809 in words is "twelve billion, two hundred sixty million, eight hundred sixteen thousand, eight hundred nine".