26211664556 has 48 divisors (see below), whose sum is σ = 57294004992. Its totient is φ = 10193601600.

The previous prime is 26211664517. The next prime is 26211664561. The reversal of 26211664556 is 65546611262.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90686 + ... + 246266.

It is an arithmetic number, because the mean of its divisors is an integer number (1193625104).

Almost surely, 2^26211664556 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 26211664556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28647002496).

26211664556 is an abundant number, since it is smaller than the sum of its proper divisors (31082340436).

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

26211664556 is a wasteful number, since it uses less digits than its factorization.

26211664556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156150 (or 156148 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The spelling of 26211664556 in words is "twenty-six billion, two hundred eleven million, six hundred sixty-four thousand, five hundred fifty-six".