26466728820 has 192 divisors, whose sum is σ = 89254158336. Its totient is φ = 5729011200.

The previous prime is 26466728791. The next prime is 26466728831. The reversal of 26466728820 is 2882766462.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 962097 + ... + 989223.

It is an arithmetic number, because the mean of its divisors is an integer number (464865408).

Almost surely, 2^26466728820 is an apocalyptic number.

26466728820 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 26466728820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44627079168).

26466728820 is an abundant number, since it is smaller than the sum of its proper divisors (62787429516).

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

26466728820 is a wasteful number, since it uses less digits than its factorization.

26466728820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27270 (or 27268 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 26466728820 in words is "twenty-six billion, four hundred sixty-six million, seven hundred twenty-eight thousand, eight hundred twenty".