26157266297 has 2 divisors, whose sum is σ = 26157266298. Its totient is φ = 26157266296.

The previous prime is 26157266243. The next prime is 26157266339. The reversal of 26157266297 is 79266275162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24831141241 + 1326125056 = 157579^2 + 36416^2 .

It is a cyclic number.

It is not a de Polignac number, because 26157266297 - 2²⁸ = 25888830841 is a prime.

It is not a weakly prime, because it can be changed into another prime (26157266227) 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, 13078633148 + 13078633149.

It is an arithmetic number, because the mean of its divisors is an integer number (13078633149).

Almost surely, 2^26157266297 is an apocalyptic number.

It is an amenable number.

26157266297 is a deficient number, since it is larger than the sum of its proper divisors (1).

26157266297 is an equidigital number, since it uses as much as digits as its factorization.

26157266297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3810240, while the sum is 53.

The spelling of 26157266297 in words is "twenty-six billion, one hundred fifty-seven million, two hundred sixty-six thousand, two hundred ninety-seven".