26297811568 has 120 divisors (see below), whose sum is σ = 61091579472. Its totient is φ = 10926461952.

The previous prime is 26297811511. The next prime is 26297811569. The reversal of 26297811568 is 86511879262.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26297811569) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8903980 + ... + 8906932.

Almost surely, 2^26297811568 is an apocalyptic number.

26297811568 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 26297811568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30545789736).

26297811568 is an abundant number, since it is smaller than the sum of its proper divisors (34793767904).

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

26297811568 is a wasteful number, since it uses less digits than its factorization.

26297811568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3319 (or 3306 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

It can be divided in two parts, 26297 and 811568, that added together give a triangular number (837865 = T₁₂₉₄).

The spelling of 26297811568 in words is "twenty-six billion, two hundred ninety-seven million, eight hundred eleven thousand, five hundred sixty-eight".