26997808860 has 576 divisors, whose sum is σ = 96643362816. Its totient is φ = 6038323200.

The previous prime is 26997808837. The next prime is 26997808861. The reversal of 26997808860 is 6880879962.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26997808861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 139884924 + ... + 139885116.

It is an arithmetic number, because the mean of its divisors is an integer number (167783616).

Almost surely, 2^26997808860 is an apocalyptic number.

26997808860 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 26997808860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48321681408).

26997808860 is an abundant number, since it is smaller than the sum of its proper divisors (69645553956).

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

26997808860 is a wasteful number, since it uses less digits than its factorization.

26997808860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346 (or 341 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 26997808860 in words is "twenty-six billion, nine hundred ninety-seven million, eight hundred eight thousand, eight hundred sixty".