26205943808 has 72 divisors (see below), whose sum is σ = 57596240520. Its totient is φ = 11911680000.

The previous prime is 26205943807. The next prime is 26205943811. The reversal of 26205943808 is 80834950262.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26205943807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 194933 + ... + 300683.

It is an arithmetic number, because the mean of its divisors is an integer number (799947785).

Almost surely, 2^26205943808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26205943808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28798120260).

26205943808 is an abundant number, since it is smaller than the sum of its proper divisors (31390296712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26205943808 is a wasteful number, since it uses less digits than its factorization.

26205943808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105795 (or 105764 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 47.

The spelling of 26205943808 in words is "twenty-six billion, two hundred five million, nine hundred forty-three thousand, eight hundred eight".