12861147641 has 2 divisors, whose sum is σ = 12861147642. Its totient is φ = 12861147640.

The previous prime is 12861147631. The next prime is 12861147667. The reversal of 12861147641 is 14674116821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7849074025 + 5012073616 = 88595^2 + 70796^2 .

It is a cyclic number.

It is not a de Polignac number, because 12861147641 - 2¹⁸ = 12860885497 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 (12861147631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6430573820 + 6430573821.

It is an arithmetic number, because the mean of its divisors is an integer number (6430573821).

Almost surely, 2^12861147641 is an apocalyptic number.

It is an amenable number.

12861147641 is a deficient number, since it is larger than the sum of its proper divisors (1).

12861147641 is an equidigital number, since it uses as much as digits as its factorization.

12861147641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64512, while the sum is 41.

The spelling of 12861147641 in words is "twelve billion, eight hundred sixty-one million, one hundred forty-seven thousand, six hundred forty-one".