26559161280 has 392 divisors, whose sum is σ = 95406466032. Its totient is φ = 7038959616.

The previous prime is 26559161257. The next prime is 26559161297. The reversal of 26559161280 is 8216195562.

26559161280 is a `hidden beast` number, since 2 + 6 + 559 + 1 + 6 + 12 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 59952739 + ... + 59953181.

Almost surely, 2^26559161280 is an apocalyptic number.

26559161280 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 26559161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47703233016).

26559161280 is an abundant number, since it is smaller than the sum of its proper divisors (68847304752).

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

26559161280 is an equidigital number, since it uses as much as digits as its factorization.

26559161280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 26559161280 in words is "twenty-six billion, five hundred fifty-nine million, one hundred sixty-one thousand, two hundred eighty".