12481945813 has 2 divisors, whose sum is σ = 12481945814. Its totient is φ = 12481945812.

The previous prime is 12481945789. The next prime is 12481945829. The reversal of 12481945813 is 31854918421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12480911524 + 1034289 = 111718^2 + 1017^2 .

It is an emirp because it is prime and its reverse (31854918421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12481945813 - 2⁵ = 12481945781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12481945613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6240972906 + 6240972907.

It is an arithmetic number, because the mean of its divisors is an integer number (6240972907).

Almost surely, 2^12481945813 is an apocalyptic number.

It is an amenable number.

12481945813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12481945813 is an equidigital number, since it uses as much as digits as its factorization.

12481945813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 276480, while the sum is 46.

The spelling of 12481945813 in words is "twelve billion, four hundred eighty-one million, nine hundred forty-five thousand, eight hundred thirteen".