26855691264 has 132 divisors (see below), whose sum is σ = 80418016224. Its totient is φ = 8951814144.

The previous prime is 26855691253. The next prime is 26855691277. The reversal of 26855691264 is 46219655862.

26855691264 is a `hidden beast` number, since 2 + 6 + 8 + 5 + 569 + 12 + 64 = 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 26855691264.

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 11 ways as a sum of consecutive naturals, for example, 194869 + ... + 302795.

Almost surely, 2^26855691264 is an apocalyptic number.

26855691264 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 26855691264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40209008112).

26855691264 is an abundant number, since it is smaller than the sum of its proper divisors (53562324960).

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

26855691264 is an equidigital number, since it uses as much as digits as its factorization.

26855691264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107962 (or 107932 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 54.

The spelling of 26855691264 in words is "twenty-six billion, eight hundred fifty-five million, six hundred ninety-one thousand, two hundred sixty-four".