26821496268 has 144 divisors (see below), whose sum is σ = 78328233984. Its totient is φ = 7580200320.

The previous prime is 26821496239. The next prime is 26821496297. The reversal of 26821496268 is 86269412862.

26821496268 is a `hidden beast` number, since 2 + 6 + 8 + 2 + 1 + 4 + 9 + 626 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (26821496239) and next prime (26821496297).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12704533 + ... + 12706643.

Almost surely, 2^26821496268 is an apocalyptic number.

26821496268 is a gapful number since it is divisible by the number (28) 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 26821496268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39164116992).

26821496268 is an abundant number, since it is smaller than the sum of its proper divisors (51506737716).

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

26821496268 is a wasteful number, since it uses less digits than its factorization.

26821496268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652 (or 2647 counting only the distinct ones).

The product of its digits is 3981312, while the sum is 54.

The spelling of 26821496268 in words is "twenty-six billion, eight hundred twenty-one million, four hundred ninety-six thousand, two hundred sixty-eight".