12547287303581 has 2 divisors, whose sum is σ = 12547287303582. Its totient is φ = 12547287303580.

The previous prime is 12547287303539. The next prime is 12547287303589. The reversal of 12547287303581 is 18530378274521.

It is a happy number.

12547287303581 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11142744705625 + 1404542597956 = 3338075^2 + 1185134^2 .

It is a cyclic number.

It is not a de Polignac number, because 12547287303581 - 2³⁰ = 12546213561757 is a prime.

It is a super-2 number, since 2×12547287303581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12547287303589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6273643651790 + 6273643651791.

It is an arithmetic number, because the mean of its divisors is an integer number (6273643651791).

Almost surely, 2^{12547287303581} is an apocalyptic number.

It is an amenable number.

12547287303581 is a deficient number, since it is larger than the sum of its proper divisors (1).

12547287303581 is an equidigital number, since it uses as much as digits as its factorization.

12547287303581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 12547287303581 in words is "twelve trillion, five hundred forty-seven billion, two hundred eighty-seven million, three hundred three thousand, five hundred eighty-one".