26281678663 has 16 divisors (see below), whose sum is σ = 27585331200. Its totient is φ = 24991661376.

The previous prime is 26281678609. The next prime is 26281678667. The reversal of 26281678663 is 36687618262.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26281678663 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26281678667) 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 15 ways as a sum of consecutive naturals, for example, 9779706 + ... + 9782392.

It is an arithmetic number, because the mean of its divisors is an integer number (1724083200).

Almost surely, 2^26281678663 is an apocalyptic number.

26281678663 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

26281678663 is a deficient number, since it is larger than the sum of its proper divisors (1303652537).

26281678663 is a wasteful number, since it uses less digits than its factorization.

26281678663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5046.

The product of its digits is 6967296, while the sum is 55.

The spelling of 26281678663 in words is "twenty-six billion, two hundred eighty-one million, six hundred seventy-eight thousand, six hundred sixty-three".