26255699512560 has 1280 divisors, whose sum is σ = 109498134528000. Its totient is φ = 5653291843584.

The previous prime is 26255699512529. The next prime is 26255699512571. The reversal of 26255699512560 is 6521599655262.

It is a happy number.

26255699512560 is a `hidden beast` number, since 2 + 6 + 2 + 5 + 5 + 69 + 9 + 5 + 1 + 2 + 560 = 666.

It is a super-3 number, since 3×26255699512560³ (a number of 41 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 6405389391 + ... + 6405393489.

It is an arithmetic number, because the mean of its divisors is an integer number (85545417600).

Almost surely, 2^{26255699512560} is an apocalyptic number.

26255699512560 is a gapful number since it is divisible by the number (20) 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 26255699512560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54749067264000).

26255699512560 is an abundant number, since it is smaller than the sum of its proper divisors (83242435015440).

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

26255699512560 is a wasteful number, since it uses less digits than its factorization.

26255699512560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4427 (or 4415 counting only the distinct ones).

The product of its (nonzero) digits is 87480000, while the sum is 63.

The spelling of 26255699512560 in words is "twenty-six trillion, two hundred fifty-five billion, six hundred ninety-nine million, five hundred twelve thousand, five hundred sixty".