26198415317 has 2 divisors, whose sum is σ = 26198415318. Its totient is φ = 26198415316.

The previous prime is 26198415311. The next prime is 26198415361. The reversal of 26198415317 is 71351489162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22096525201 + 4101890116 = 148649^2 + 64046^2 .

It is a cyclic number.

It is not a de Polignac number, because 26198415317 - 2³⁰ = 25124673493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26198415311) 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, 13099207658 + 13099207659.

It is an arithmetic number, because the mean of its divisors is an integer number (13099207659).

Almost surely, 2^26198415317 is an apocalyptic number.

It is an amenable number.

26198415317 is a deficient number, since it is larger than the sum of its proper divisors (1).

26198415317 is an equidigital number, since it uses as much as digits as its factorization.

26198415317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 47.

The spelling of 26198415317 in words is "twenty-six billion, one hundred ninety-eight million, four hundred fifteen thousand, three hundred seventeen".