128263365280 has 384 divisors, whose sum is σ = 341561670912. Its totient is φ = 45296713728.

The previous prime is 128263365257. The next prime is 128263365287. The reversal of 128263365280 is 82563362821.

It is a self number, because there is not a number n which added to its sum of digits gives 128263365280.

It is not an unprimeable number, because it can be changed into a prime (128263365287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 463044502 + ... + 463044778.

It is an arithmetic number, because the mean of its divisors is an integer number (889483518).

Almost surely, 2^128263365280 is an apocalyptic number.

128263365280 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 128263365280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170780835456).

128263365280 is an abundant number, since it is smaller than the sum of its proper divisors (213298305632).

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

128263365280 is a wasteful number, since it uses less digits than its factorization.

128263365280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 128263365280 in words is "one hundred twenty-eight billion, two hundred sixty-three million, three hundred sixty-five thousand, two hundred eighty".