26026138693 has 2 divisors, whose sum is σ = 26026138694. Its totient is φ = 26026138692.

The previous prime is 26026138637. The next prime is 26026138709. The reversal of 26026138693 is 39683162062.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25460031844 + 566106849 = 159562^2 + 23793^2 .

It is a cyclic number.

It is not a de Polignac number, because 26026138693 - 2³³ = 17436204101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26026138613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13013069346 + 13013069347.

It is an arithmetic number, because the mean of its divisors is an integer number (13013069347).

Almost surely, 2^26026138693 is an apocalyptic number.

It is an amenable number.

26026138693 is a deficient number, since it is larger than the sum of its proper divisors (1).

26026138693 is an equidigital number, since it uses as much as digits as its factorization.

26026138693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 559872, while the sum is 46.

The spelling of 26026138693 in words is "twenty-six billion, twenty-six million, one hundred thirty-eight thousand, six hundred ninety-three".