26530647289 has 2 divisors, whose sum is σ = 26530647290. Its totient is φ = 26530647288.

The previous prime is 26530647281. The next prime is 26530647307. The reversal of 26530647289 is 98274603562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23562250000 + 2968397289 = 153500^2 + 54483^2 .

It is a cyclic number.

It is not a de Polignac number, because 26530647289 - 2³ = 26530647281 is a prime.

It is not a weakly prime, because it can be changed into another prime (26530647281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13265323644 + 13265323645.

It is an arithmetic number, because the mean of its divisors is an integer number (13265323645).

Almost surely, 2^26530647289 is an apocalyptic number.

It is an amenable number.

26530647289 is a deficient number, since it is larger than the sum of its proper divisors (1).

26530647289 is an equidigital number, since it uses as much as digits as its factorization.

26530647289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4354560, while the sum is 52.

The spelling of 26530647289 in words is "twenty-six billion, five hundred thirty million, six hundred forty-seven thousand, two hundred eighty-nine".