26220905280 has 560 divisors, whose sum is σ = 98268153984. Its totient is φ = 6651279360.

The previous prime is 26220905273. The next prime is 26220905297. The reversal of 26220905280 is 8250902262.

26220905280 is a `hidden beast` number, since 2 + 622 + 0 + 9 + 0 + 5 + 28 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 144866790 + ... + 144866970.

Almost surely, 2^26220905280 is an apocalyptic number.

26220905280 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 26220905280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49134076992).

26220905280 is an abundant number, since it is smaller than the sum of its proper divisors (72047248704).

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

26220905280 is an frugal number, since it uses more digits than its factorization.

26220905280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 214 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 26220905280 in words is "twenty-six billion, two hundred twenty million, nine hundred five thousand, two hundred eighty".