26215305013 has 2 divisors, whose sum is σ = 26215305014. Its totient is φ = 26215305012.

The previous prime is 26215305001. The next prime is 26215305019. The reversal of 26215305013 is 31050351262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24064386129 + 2150918884 = 155127^2 + 46378^2 .

It is a cyclic number.

It is not a de Polignac number, because 26215305013 - 2⁵ = 26215304981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26215305019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13107652506 + 13107652507.

It is an arithmetic number, because the mean of its divisors is an integer number (13107652507).

Almost surely, 2^26215305013 is an apocalyptic number.

It is an amenable number.

26215305013 is a deficient number, since it is larger than the sum of its proper divisors (1).

26215305013 is an equidigital number, since it uses as much as digits as its factorization.

26215305013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 26215305013 its reverse (31050351262), we get a palindrome (57265656275).

The spelling of 26215305013 in words is "twenty-six billion, two hundred fifteen million, three hundred five thousand, thirteen".