26691280000 has 480 divisors, whose sum is σ = 84457652400. Its totient is φ = 8305920000.

The previous prime is 26691279917. The next prime is 26691280001. The reversal of 26691280000 is 8219662.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (26691280001) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 43119691 + ... + 43120309.

Almost surely, 2^26691280000 is an apocalyptic number.

26691280000 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 26691280000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42228826200).

26691280000 is an abundant number, since it is smaller than the sum of its proper divisors (57766372400).

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

26691280000 is an equidigital number, since it uses as much as digits as its factorization.

26691280000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 644 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

Adding to 26691280000 its reverse (8219662), we get a palindrome (26699499662).

The spelling of 26691280000 in words is "twenty-six billion, six hundred ninety-one million, two hundred eighty thousand".