26012851217 has 2 divisors, whose sum is σ = 26012851218. Its totient is φ = 26012851216.

The previous prime is 26012851177. The next prime is 26012851219. The reversal of 26012851217 is 71215821062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19846047376 + 6166803841 = 140876^2 + 78529^2 .

It is a cyclic number.

It is not a de Polignac number, because 26012851217 - 2¹² = 26012847121 is a prime.

Together with 26012851219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26012851219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13006425608 + 13006425609.

It is an arithmetic number, because the mean of its divisors is an integer number (13006425609).

Almost surely, 2^26012851217 is an apocalyptic number.

It is an amenable number.

26012851217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26012851217 is an equidigital number, since it uses as much as digits as its factorization.

26012851217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The spelling of 26012851217 in words is "twenty-six billion, twelve million, eight hundred fifty-one thousand, two hundred seventeen".