12513263881 has 2 divisors, whose sum is σ = 12513263882. Its totient is φ = 12513263880.

The previous prime is 12513263849. The next prime is 12513263887. The reversal of 12513263881 is 18836231521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12171605625 + 341658256 = 110325^2 + 18484^2 .

It is a cyclic number.

It is not a de Polignac number, because 12513263881 - 2⁵ = 12513263849 is a prime.

It is a super-2 number, since 2×12513263881² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12513263887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6256631940 + 6256631941.

It is an arithmetic number, because the mean of its divisors is an integer number (6256631941).

Almost surely, 2^12513263881 is an apocalyptic number.

It is an amenable number.

12513263881 is a deficient number, since it is larger than the sum of its proper divisors (1).

12513263881 is an equidigital number, since it uses as much as digits as its factorization.

12513263881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 40.

The spelling of 12513263881 in words is "twelve billion, five hundred thirteen million, two hundred sixty-three thousand, eight hundred eighty-one".