26390652289 has 2 divisors, whose sum is σ = 26390652290. Its totient is φ = 26390652288.

The previous prime is 26390652271. The next prime is 26390652313. The reversal of 26390652289 is 98225609362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24575892289 + 1814760000 = 156767^2 + 42600^2 .

It is a cyclic number.

It is not a de Polignac number, because 26390652289 - 2⁷ = 26390652161 is a prime.

It is not a weakly prime, because it can be changed into another prime (26390656289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13195326144 + 13195326145.

It is an arithmetic number, because the mean of its divisors is an integer number (13195326145).

Almost surely, 2^26390652289 is an apocalyptic number.

It is an amenable number.

26390652289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26390652289 is an equidigital number, since it uses as much as digits as its factorization.

26390652289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 26390652289 in words is "twenty-six billion, three hundred ninety million, six hundred fifty-two thousand, two hundred eighty-nine".