26005332805 has 4 divisors (see below), whose sum is σ = 31206399372. Its totient is φ = 20804266240.

The previous prime is 26005332799. The next prime is 26005332809. The reversal of 26005332805 is 50823350062.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19403932804 + 6601400001 = 139298^2 + 81249^2 .

It is not a de Polignac number, because 26005332805 - 2⁷ = 26005332677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26005332809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600533276 + ... + 2600533285.

It is an arithmetic number, because the mean of its divisors is an integer number (7801599843).

Almost surely, 2^26005332805 is an apocalyptic number.

It is an amenable number.

26005332805 is a deficient number, since it is larger than the sum of its proper divisors (5201066567).

26005332805 is an equidigital number, since it uses as much as digits as its factorization.

26005332805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5201066566.

The product of its (nonzero) digits is 43200, while the sum is 34.

Adding to 26005332805 its reverse (50823350062), we get a palindrome (76828682867).

The spelling of 26005332805 in words is "twenty-six billion, five million, three hundred thirty-two thousand, eight hundred five".