26681640000 has 140 divisors (see below), whose sum is σ = 88216124304. Its totient is φ = 7115072000.

The previous prime is 26681639993. The next prime is 26681640001. The reversal of 26681640000 is 4618662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26681640001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8827 + ... + 231173.

Almost surely, 2^26681640000 is an apocalyptic number.

26681640000 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 26681640000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44108062152).

26681640000 is an abundant number, since it is smaller than the sum of its proper divisors (61534484304).

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

26681640000 is an equidigital number, since it uses as much as digits as its factorization.

26681640000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222382 (or 222357 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The spelling of 26681640000 in words is "twenty-six billion, six hundred eighty-one million, six hundred forty thousand".