26501252917 has 2 divisors, whose sum is σ = 26501252918. Its totient is φ = 26501252916.

The previous prime is 26501252891. The next prime is 26501252929. The reversal of 26501252917 is 71925210562.

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., 19001519716 + 7499733201 = 137846^2 + 86601^2 .

It is a cyclic number.

It is not a de Polignac number, because 26501252917 - 2¹¹ = 26501250869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26501252917.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26501256917) 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, 13250626458 + 13250626459.

It is an arithmetic number, because the mean of its divisors is an integer number (13250626459).

Almost surely, 2^26501252917 is an apocalyptic number.

It is an amenable number.

26501252917 is a deficient number, since it is larger than the sum of its proper divisors (1).

26501252917 is an equidigital number, since it uses as much as digits as its factorization.

26501252917 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 40.

The spelling of 26501252917 in words is "twenty-six billion, five hundred one million, two hundred fifty-two thousand, nine hundred seventeen".