12564276552449 has 2 divisors, whose sum is σ = 12564276552450. Its totient is φ = 12564276552448.

The previous prime is 12564276552427. The next prime is 12564276552523. The reversal of 12564276552449 is 94425567246521.

It is a happy number.

12564276552449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8527170897424 + 4037105655025 = 2920132^2 + 2009255^2 .

It is a cyclic number.

It is not a de Polignac number, because 12564276552449 - 2¹² = 12564276548353 is a prime.

It is a super-2 number, since 2×12564276552449² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12564276552391 and 12564276552400.

It is not a weakly prime, because it can be changed into another prime (12564276552419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6282138276224 + 6282138276225.

It is an arithmetic number, because the mean of its divisors is an integer number (6282138276225).

Almost surely, 2^{12564276552449} is an apocalyptic number.

It is an amenable number.

12564276552449 is a deficient number, since it is larger than the sum of its proper divisors (1).

12564276552449 is an equidigital number, since it uses as much as digits as its factorization.

12564276552449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 145152000, while the sum is 62.

The spelling of 12564276552449 in words is "twelve trillion, five hundred sixty-four billion, two hundred seventy-six million, five hundred fifty-two thousand, four hundred forty-nine".