26543268864 has 704 divisors, whose sum is σ = 96212275200. Its totient is φ = 7065501696.

The previous prime is 26543268811. The next prime is 26543268877. The reversal of 26543268864 is 46886234562.

It is a happy number.

26543268864 is a `hidden beast` number, since 265 + 43 + 268 + 86 + 4 = 666.

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

It is a self number, because there is not a number n which added to its sum of digits gives 26543268864.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298238932 + ... + 298239020.

Almost surely, 2^26543268864 is an apocalyptic number.

26543268864 is a gapful number since it is divisible by the number (24) 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 26543268864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48106137600).

26543268864 is an abundant number, since it is smaller than the sum of its proper divisors (69669006336).

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

26543268864 is a wasteful number, since it uses less digits than its factorization.

26543268864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215 (or 191 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 54.

The spelling of 26543268864 in words is "twenty-six billion, five hundred forty-three million, two hundred sixty-eight thousand, eight hundred sixty-four".