12545622281 has 2 divisors, whose sum is σ = 12545622282. Its totient is φ = 12545622280.

The previous prime is 12545622263. The next prime is 12545622289. The reversal of 12545622281 is 18222654521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12455676025 + 89946256 = 111605^2 + 9484^2 .

It is a cyclic number.

It is not a de Polignac number, because 12545622281 - 2³⁰ = 11471880457 is a prime.

It is a super-2 number, since 2×12545622281² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12545622289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6272811140 + 6272811141.

It is an arithmetic number, because the mean of its divisors is an integer number (6272811141).

Almost surely, 2^12545622281 is an apocalyptic number.

It is an amenable number.

12545622281 is a deficient number, since it is larger than the sum of its proper divisors (1).

12545622281 is an equidigital number, since it uses as much as digits as its factorization.

12545622281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 38.

The spelling of 12545622281 in words is "twelve billion, five hundred forty-five million, six hundred twenty-two thousand, two hundred eighty-one".