26426335217 has 2 divisors, whose sum is σ = 26426335218. Its totient is φ = 26426335216.

The previous prime is 26426335213. The next prime is 26426335279. The reversal of 26426335217 is 71253362462.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22154536336 + 4271798881 = 148844^2 + 65359^2 .

It is a cyclic number.

It is not a de Polignac number, because 26426335217 - 2² = 26426335213 is a prime.

It is not a weakly prime, because it can be changed into another prime (26426335213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13213167608 + 13213167609.

It is an arithmetic number, because the mean of its divisors is an integer number (13213167609).

Almost surely, 2^26426335217 is an apocalyptic number.

It is an amenable number.

26426335217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26426335217 is an equidigital number, since it uses as much as digits as its factorization.

26426335217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 362880, while the sum is 41.

Adding to 26426335217 its reverse (71253362462), we get a palindrome (97679697679).

The spelling of 26426335217 in words is "twenty-six billion, four hundred twenty-six million, three hundred thirty-five thousand, two hundred seventeen".