128546981409280 has 640 divisors, whose sum is σ = 359114563196928. Its totient is φ = 43222566961152.

The previous prime is 128546981409239. The next prime is 128546981409311. The reversal of 128546981409280 is 82904189645821.

It is a tau number, because it is divible by the number of its divisors (640).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 199917544639 + ... + 199917545281.

Almost surely, 2^{128546981409280} is an apocalyptic number.

128546981409280 is a gapful number since it is divisible by the number (10) 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 128546981409280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179557281598464).

128546981409280 is an abundant number, since it is smaller than the sum of its proper divisors (230567581787648).

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

128546981409280 is an equidigital number, since it uses as much as digits as its factorization.

128546981409280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1536 (or 1520 counting only the distinct ones).

The product of its (nonzero) digits is 79626240, while the sum is 67.

The spelling of 128546981409280 in words is "one hundred twenty-eight trillion, five hundred forty-six billion, nine hundred eighty-one million, four hundred nine thousand, two hundred eighty".