26143377217 has 2 divisors, whose sum is σ = 26143377218. Its totient is φ = 26143377216.

The previous prime is 26143377193. The next prime is 26143377229. The reversal of 26143377217 is 71277334162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19321278001 + 6822099216 = 139001^2 + 82596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26143377217 is a prime.

It is not a weakly prime, because it can be changed into another prime (26143377917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13071688608 + 13071688609.

It is an arithmetic number, because the mean of its divisors is an integer number (13071688609).

Almost surely, 2^26143377217 is an apocalyptic number.

It is an amenable number.

26143377217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26143377217 is an equidigital number, since it uses as much as digits as its factorization.

26143377217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 296352, while the sum is 43.

The spelling of 26143377217 in words is "twenty-six billion, one hundred forty-three million, three hundred seventy-seven thousand, two hundred seventeen".