26311000813 has 2 divisors, whose sum is σ = 26311000814. Its totient is φ = 26311000812.

The previous prime is 26311000753. The next prime is 26311000817. The reversal of 26311000813 is 31800011362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24532017129 + 1778983684 = 156627^2 + 42178^2 .

It is a cyclic number.

It is not a de Polignac number, because 26311000813 - 2¹³ = 26310992621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26311000817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13155500406 + 13155500407.

It is an arithmetic number, because the mean of its divisors is an integer number (13155500407).

Almost surely, 2^26311000813 is an apocalyptic number.

It is an amenable number.

26311000813 is a deficient number, since it is larger than the sum of its proper divisors (1).

26311000813 is an equidigital number, since it uses as much as digits as its factorization.

26311000813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 26311000813 in words is "twenty-six billion, three hundred eleven million, eight hundred thirteen", and thus it is an aban number.