26205296280 has 128 divisors (see below), whose sum is σ = 83919628800. Its totient is φ = 6527001600.

The previous prime is 26205296233. The next prime is 26205296311. The reversal of 26205296280 is 8269250262.

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 31 ways as a sum of consecutive naturals, for example, 80940 + ... + 242820.

It is an arithmetic number, because the mean of its divisors is an integer number (655622100).

Almost surely, 2^26205296280 is an apocalyptic number.

26205296280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is a pronic number, being equal to 161880×161881.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26205296280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41959814400).

26205296280 is an abundant number, since it is smaller than the sum of its proper divisors (57714332520).

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

26205296280 is a wasteful number, since it uses less digits than its factorization.

26205296280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161985 (or 161981 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 26205296280 in words is "twenty-six billion, two hundred five million, two hundred ninety-six thousand, two hundred eighty".