12711505813 has 2 divisors, whose sum is σ = 12711505814. Its totient is φ = 12711505812.

The previous prime is 12711505777. The next prime is 12711505817. The reversal of 12711505813 is 31850511721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6399680004 + 6311825809 = 79998^2 + 79447^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12711505813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12711505817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6355752906 + 6355752907.

It is an arithmetic number, because the mean of its divisors is an integer number (6355752907).

Almost surely, 2^12711505813 is an apocalyptic number.

It is an amenable number.

12711505813 is a deficient number, since it is larger than the sum of its proper divisors (1).

12711505813 is an equidigital number, since it uses as much as digits as its factorization.

12711505813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8400, while the sum is 34.

The spelling of 12711505813 in words is "twelve billion, seven hundred eleven million, five hundred five thousand, eight hundred thirteen".