26561656525230 has 192 divisors, whose sum is σ = 73178508533760. Its totient is φ = 6855572764800.

The previous prime is 26561656525211. The next prime is 26561656525247. The reversal of 26561656525230 is 3252565616562.

26561656525230 is a `hidden beast` number, since 2 + 6 + 5 + 6 + 1 + 65 + 6 + 52 + 523 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70411215 + ... + 70787445.

It is an arithmetic number, because the mean of its divisors is an integer number (381138065280).

Almost surely, 2^{26561656525230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26561656525230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36589254266880).

26561656525230 is an abundant number, since it is smaller than the sum of its proper divisors (46616852008530).

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

26561656525230 is a wasteful number, since it uses less digits than its factorization.

26561656525230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 376512 (or 376469 counting only the distinct ones).

The product of its (nonzero) digits is 19440000, while the sum is 54.

The spelling of 26561656525230 in words is "twenty-six trillion, five hundred sixty-one billion, six hundred fifty-six million, five hundred twenty-five thousand, two hundred thirty".