12765266281 has 2 divisors, whose sum is σ = 12765266282. Its totient is φ = 12765266280.

The previous prime is 12765266263. The next prime is 12765266387. The reversal of 12765266281 is 18266256721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12540416256 + 224850025 = 111984^2 + 14995^2 .

It is an emirp because it is prime and its reverse (18266256721) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12765266281 - 2⁹ = 12765265769 is a prime.

It is a super-2 number, since 2×12765266281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12765246281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6382633140 + 6382633141.

It is an arithmetic number, because the mean of its divisors is an integer number (6382633141).

Almost surely, 2^12765266281 is an apocalyptic number.

It is an amenable number.

12765266281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12765266281 is an equidigital number, since it uses as much as digits as its factorization.

12765266281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The spelling of 12765266281 in words is "twelve billion, seven hundred sixty-five million, two hundred sixty-six thousand, two hundred eighty-one".