26405266313 has 2 divisors, whose sum is σ = 26405266314. Its totient is φ = 26405266312.

The previous prime is 26405266309. The next prime is 26405266331. The reversal of 26405266313 is 31366250462.

It is a happy number.

Together with next prime (26405266331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21464301049 + 4940965264 = 146507^2 + 70292^2 .

It is a cyclic number.

It is not a de Polignac number, because 26405266313 - 2² = 26405266309 is a prime.

It is a super-2 number, since 2×26405266313² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (26405266513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13202633156 + 13202633157.

It is an arithmetic number, because the mean of its divisors is an integer number (13202633157).

Almost surely, 2^26405266313 is an apocalyptic number.

It is an amenable number.

26405266313 is a deficient number, since it is larger than the sum of its proper divisors (1).

26405266313 is an equidigital number, since it uses as much as digits as its factorization.

26405266313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 26405266313 in words is "twenty-six billion, four hundred five million, two hundred sixty-six thousand, three hundred thirteen".