12561343563045 has 32 divisors (see below), whose sum is σ = 20589403685760. Its totient is φ = 6535648655360.

The previous prime is 12561343563031. The next prime is 12561343563053. The reversal of 12561343563045 is 54036534316521.

It is not a de Polignac number, because 12561343563045 - 2⁶ = 12561343562981 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12561343562985 and 12561343563003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11718262 + ... + 12745208.

It is an arithmetic number, because the mean of its divisors is an integer number (643418865180).

Almost surely, 2^{12561343563045} is an apocalyptic number.

12561343563045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12561343563045 is a deficient number, since it is larger than the sum of its proper divisors (8028060122715).

12561343563045 is a wasteful number, since it uses less digits than its factorization.

12561343563045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046885.

The product of its (nonzero) digits is 3888000, while the sum is 48.

Adding to 12561343563045 its reverse (54036534316521), we get a palindrome (66597877879566).

The spelling of 12561343563045 in words is "twelve trillion, five hundred sixty-one billion, three hundred forty-three million, five hundred sixty-three thousand, forty-five".