26311000805 has 8 divisors (see below), whose sum is σ = 31591557144. Its totient is φ = 21036563200.

The previous prime is 26311000753. The next prime is 26311000813. The reversal of 26311000805 is 50800011362.

It can be written as a sum of positive squares in 4 ways, for example, as 314920516 + 25996080289 = 17746^2 + 161233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 26311000805 - 2¹² = 26310996709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1520216 + ... + 1537425.

It is an arithmetic number, because the mean of its divisors is an integer number (3948944643).

Almost surely, 2^26311000805 is an apocalyptic number.

It is an amenable number.

26311000805 is a deficient number, since it is larger than the sum of its proper divisors (5280556339).

26311000805 is a wasteful number, since it uses less digits than its factorization.

26311000805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3059367.

The product of its (nonzero) digits is 1440, while the sum is 26.

The spelling of 26311000805 in words is "twenty-six billion, three hundred eleven million, eight hundred five", and thus it is an aban number.