26228626864669 has 2 divisors, whose sum is σ = 26228626864670. Its totient is φ = 26228626864668.

The previous prime is 26228626864621. The next prime is 26228626864723. The reversal of 26228626864669 is 96646862682262.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26021476265625 + 207150599044 = 5101125^2 + 455138^2 .

It is a cyclic number.

It is not a de Polignac number, because 26228626864669 - 2²³ = 26228618476061 is a prime.

It is a super-2 number, since 2×26228626864669² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26228626964669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13114313432334 + 13114313432335.

It is an arithmetic number, because the mean of its divisors is an integer number (13114313432335).

Almost surely, 2^{26228626864669} is an apocalyptic number.

It is an amenable number.

26228626864669 is a deficient number, since it is larger than the sum of its proper divisors (1).

26228626864669 is an equidigital number, since it uses as much as digits as its factorization.

26228626864669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1719926784, while the sum is 73.

The spelling of 26228626864669 in words is "twenty-six trillion, two hundred twenty-eight billion, six hundred twenty-six million, eight hundred sixty-four thousand, six hundred sixty-nine".