12881724948545 has 16 divisors (see below), whose sum is σ = 16423229526480. Its totient is φ = 9666078111744.

The previous prime is 12881724948509. The next prime is 12881724948559. The reversal of 12881724948545 is 54584942718821.

It is a Cunningham number, because it is equal to 3589112²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 12881724948544 = 1^2 + 3589112^2 .

It is a cyclic number.

It is not a de Polignac number, because 12881724948545 - 2²⁴ = 12881708171329 is a prime.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 258592340 + ... + 258642149.

It is an arithmetic number, because the mean of its divisors is an integer number (1026451845405).

Almost surely, 2^{12881724948545} is an apocalyptic number.

It is an amenable number.

12881724948545 is a deficient number, since it is larger than the sum of its proper divisors (3541504577935).

12881724948545 is a wasteful number, since it uses less digits than its factorization.

12881724948545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517234804.

The product of its digits is 206438400, while the sum is 68.

The spelling of 12881724948545 in words is "twelve trillion, eight hundred eighty-one billion, seven hundred twenty-four million, nine hundred forty-eight thousand, five hundred forty-five".