26365681 has 2 divisors, whose sum is σ = 26365682. Its totient is φ = 26365680.

The previous prime is 26365649. The next prime is 26365721. The reversal of 26365681 is 18656362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23853456 + 2512225 = 4884^2 + 1585^2 .

It is a cyclic number.

It is not a de Polignac number, because 26365681 - 2⁵ = 26365649 is a prime.

It is a super-2 number, since 2×26365681² = 1390298269187522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26365681.

It is not a weakly prime, because it can be changed into another prime (26365601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13182840 + 13182841.

It is an arithmetic number, because the mean of its divisors is an integer number (13182841).

Almost surely, 2^26365681 is an apocalyptic number.

It is an amenable number.

26365681 is a deficient number, since it is larger than the sum of its proper divisors (1).

26365681 is an equidigital number, since it uses as much as digits as its factorization.

26365681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 37.

The square root of 26365681 is about 5134.7522822430. The cubic root of 26365681 is about 297.6320285857.

The spelling of 26365681 in words is "twenty-six million, three hundred sixty-five thousand, six hundred eighty-one".