26559881 has 2 divisors, whose sum is σ = 26559882. Its totient is φ = 26559880.

The previous prime is 26559851. The next prime is 26559913. The reversal of 26559881 is 18895562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23377225 + 3182656 = 4835^2 + 1784^2 .

It is a cyclic number.

It is not a de Polignac number, because 26559881 - 2⁶ = 26559817 is a prime.

It is a super-2 number, since 2×26559881² = 1410854557468322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26559811) 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, 13279940 + 13279941.

It is an arithmetic number, because the mean of its divisors is an integer number (13279941).

Almost surely, 2^26559881 is an apocalyptic number.

It is an amenable number.

26559881 is a deficient number, since it is larger than the sum of its proper divisors (1).

26559881 is an equidigital number, since it uses as much as digits as its factorization.

26559881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 172800, while the sum is 44.

The square root of 26559881 is about 5153.6279454380. The cubic root of 26559881 is about 298.3609914400.

The spelling of 26559881 in words is "twenty-six million, five hundred fifty-nine thousand, eight hundred eighty-one".