26628502289 has 2 divisors, whose sum is σ = 26628502290. Its totient is φ = 26628502288.

The previous prime is 26628502283. The next prime is 26628502321. The reversal of 26628502289 is 98220582662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24418750225 + 2209752064 = 156265^2 + 47008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26628502289 is a prime.

It is not a weakly prime, because it can be changed into another prime (26628502283) 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, 13314251144 + 13314251145.

It is an arithmetic number, because the mean of its divisors is an integer number (13314251145).

Almost surely, 2^26628502289 is an apocalyptic number.

It is an amenable number.

26628502289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26628502289 is an equidigital number, since it uses as much as digits as its factorization.

26628502289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1658880, while the sum is 50.

The spelling of 26628502289 in words is "twenty-six billion, six hundred twenty-eight million, five hundred two thousand, two hundred eighty-nine".