26563236560 has 80 divisors (see below), whose sum is σ = 70990563456. Its totient is φ = 9054718464.

The previous prime is 26563236527. The next prime is 26563236607. The reversal of 26563236560 is 6563236562.

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 40214 + ... + 233973.

Almost surely, 2^26563236560 is an apocalyptic number.

26563236560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26563236560 is an abundant number, since it is smaller than the sum of its proper divisors (44427326896).

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

26563236560 is a wasteful number, since it uses less digits than its factorization.

26563236560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274380 (or 274374 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 44.

The spelling of 26563236560 in words is "twenty-six billion, five hundred sixty-three million, two hundred thirty-six thousand, five hundred sixty".