26856551904 has 432 divisors, whose sum is σ = 91457254224. Its totient is φ = 6839562240.

The previous prime is 26856551899. The next prime is 26856551947. The reversal of 26856551904 is 40915565862.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 58766844 + ... + 58767300.

It is an arithmetic number, because the mean of its divisors is an integer number (211706607).

Almost surely, 2^26856551904 is an apocalyptic number.

26856551904 is a gapful number since it is divisible by the number (24) 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 26856551904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45728627112).

26856551904 is an abundant number, since it is smaller than the sum of its proper divisors (64600702320).

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

26856551904 is a wasteful number, since it uses less digits than its factorization.

26856551904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 51.

The spelling of 26856551904 in words is "twenty-six billion, eight hundred fifty-six million, five hundred fifty-one thousand, nine hundred four".