26886581856 has 96 divisors (see below), whose sum is σ = 78732259200. Its totient is φ = 8926416000.

The previous prime is 26886581833. The next prime is 26886581923. The reversal of 26886581856 is 65818568862.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 26886581793 and 26886581802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154875 + ... + 278853.

It is an arithmetic number, because the mean of its divisors is an integer number (820127700).

Almost surely, 2^26886581856 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 26886581856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39366129600).

26886581856 is an abundant number, since it is smaller than the sum of its proper divisors (51845677344).

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

26886581856 is a wasteful number, since it uses less digits than its factorization.

26886581856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124249 (or 124235 counting only the distinct ones).

The product of its digits is 44236800, while the sum is 63.

The spelling of 26886581856 in words is "twenty-six billion, eight hundred eighty-six million, five hundred eighty-one thousand, eight hundred fifty-six".