26058217805 has 4 divisors (see below), whose sum is σ = 31269861372. Its totient is φ = 20846574240.

The previous prime is 26058217789. The next prime is 26058217859. The reversal of 26058217805 is 50871285062.

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 3755483524 + 22302734281 = 61282^2 + 149341^2 .

It is not a de Polignac number, because 26058217805 - 2⁴ = 26058217789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2605821776 + ... + 2605821785.

It is an arithmetic number, because the mean of its divisors is an integer number (7817465343).

Almost surely, 2^26058217805 is an apocalyptic number.

It is an amenable number.

26058217805 is a deficient number, since it is larger than the sum of its proper divisors (5211643567).

26058217805 is an equidigital number, since it uses as much as digits as its factorization.

26058217805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5211643566.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 26058217805 in words is "twenty-six billion, fifty-eight million, two hundred seventeen thousand, eight hundred five".