26257280117 has 2 divisors, whose sum is σ = 26257280118. Its totient is φ = 26257280116.

The previous prime is 26257280107. The next prime is 26257280129. The reversal of 26257280117 is 71108275262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22473307921 + 3783972196 = 149911^2 + 61514^2 .

It is a cyclic number.

It is not a de Polignac number, because 26257280117 - 2⁶ = 26257280053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26257280107) 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, 13128640058 + 13128640059.

It is an arithmetic number, because the mean of its divisors is an integer number (13128640059).

Almost surely, 2^26257280117 is an apocalyptic number.

It is an amenable number.

26257280117 is a deficient number, since it is larger than the sum of its proper divisors (1).

26257280117 is an equidigital number, since it uses as much as digits as its factorization.

26257280117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 26257280117 in words is "twenty-six billion, two hundred fifty-seven million, two hundred eighty thousand, one hundred seventeen".