26512870289 has 2 divisors, whose sum is σ = 26512870290. Its totient is φ = 26512870288.

The previous prime is 26512870283. The next prime is 26512870369. The reversal of 26512870289 is 98207821562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19892281600 + 6620588689 = 141040^2 + 81367^2 .

It is a cyclic number.

It is not a de Polignac number, because 26512870289 - 2⁴ = 26512870273 is a prime.

It is a super-2 number, since 2×26512870289² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (26512870283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13256435144 + 13256435145.

It is an arithmetic number, because the mean of its divisors is an integer number (13256435145).

Almost surely, 2^26512870289 is an apocalyptic number.

It is an amenable number.

26512870289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26512870289 is an equidigital number, since it uses as much as digits as its factorization.

26512870289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 26512870289 in words is "twenty-six billion, five hundred twelve million, eight hundred seventy thousand, two hundred eighty-nine".