12515275277489 has 2 divisors, whose sum is σ = 12515275277490. Its totient is φ = 12515275277488.

The previous prime is 12515275277429. The next prime is 12515275277563. The reversal of 12515275277489 is 98477257251521.

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., 9626747290000 + 2888527987489 = 3102700^2 + 1699567^2 .

It is a cyclic number.

It is not a de Polignac number, because 12515275277489 - 2²⁴ = 12515258500273 is a prime.

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 (12515275277429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6257637638744 + 6257637638745.

It is an arithmetic number, because the mean of its divisors is an integer number (6257637638745).

Almost surely, 2^{12515275277489} is an apocalyptic number.

It is an amenable number.

12515275277489 is a deficient number, since it is larger than the sum of its proper divisors (1).

12515275277489 is an equidigital number, since it uses as much as digits as its factorization.

12515275277489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784000, while the sum is 65.

The spelling of 12515275277489 in words is "twelve trillion, five hundred fifteen billion, two hundred seventy-five million, two hundred seventy-seven thousand, four hundred eighty-nine".