26263606656 has 256 divisors, whose sum is σ = 81113011200. Its totient is φ = 7374766080.

The previous prime is 26263606639. The next prime is 26263606667. The reversal of 26263606656 is 65660636262.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 74400976 + ... + 74401328.

It is an arithmetic number, because the mean of its divisors is an integer number (316847700).

Almost surely, 2^26263606656 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 26263606656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40556505600).

26263606656 is an abundant number, since it is smaller than the sum of its proper divisors (54849404544).

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

26263606656 is a wasteful number, since it uses less digits than its factorization.

26263606656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777 (or 765 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 48.

The spelling of 26263606656 in words is "twenty-six billion, two hundred sixty-three million, six hundred six thousand, six hundred fifty-six".