26326561 has 2 divisors, whose sum is σ = 26326562. Its totient is φ = 26326560.

The previous prime is 26326549. The next prime is 26326579. The reversal of 26326561 is 16562362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17139600 + 9186961 = 4140^2 + 3031^2 .

It is a cyclic number.

It is not a de Polignac number, because 26326561 - 2⁹ = 26326049 is a prime.

It is not a weakly prime, because it can be changed into another prime (26326541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13163280 + 13163281.

It is an arithmetic number, because the mean of its divisors is an integer number (13163281).

Almost surely, 2^26326561 is an apocalyptic number.

It is an amenable number.

26326561 is a deficient number, since it is larger than the sum of its proper divisors (1).

26326561 is an equidigital number, since it uses as much as digits as its factorization.

26326561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 26326561 is about 5130.9415315320. The cubic root of 26326561 is about 297.4847521785.

The spelling of 26326561 in words is "twenty-six million, three hundred twenty-six thousand, five hundred sixty-one".