12559951813 has 2 divisors, whose sum is σ = 12559951814. Its totient is φ = 12559951812.

The previous prime is 12559951741. The next prime is 12559951853. The reversal of 12559951813 is 31815995521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10879115809 + 1680836004 = 104303^2 + 40998^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12559951813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12559951853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6279975906 + 6279975907.

It is an arithmetic number, because the mean of its divisors is an integer number (6279975907).

Almost surely, 2^12559951813 is an apocalyptic number.

It is an amenable number.

12559951813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12559951813 is an equidigital number, since it uses as much as digits as its factorization.

12559951813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486000, while the sum is 49.

The spelling of 12559951813 in words is "twelve billion, five hundred fifty-nine million, nine hundred fifty-one thousand, eight hundred thirteen".