26181116808 has 128 divisors (see below), whose sum is σ = 83143480320. Its totient is φ = 6671957760.

The previous prime is 26181116807. The next prime is 26181116909. The reversal of 26181116808 is 80861118162.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 26181116808.

It is not an unprimeable number, because it can be changed into a prime (26181116807) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 35710 + ... + 231597.

It is an arithmetic number, because the mean of its divisors is an integer number (649558440).

Almost surely, 2^26181116808 is an apocalyptic number.

26181116808 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26181116808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41571740160).

26181116808 is an abundant number, since it is smaller than the sum of its proper divisors (56962363512).

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

26181116808 is a wasteful number, since it uses less digits than its factorization.

26181116808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267387 (or 267383 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 42.

The spelling of 26181116808 in words is "twenty-six billion, one hundred eighty-one million, one hundred sixteen thousand, eight hundred eight".