128278234256416 has 96 divisors (see below), whose sum is σ = 257666108313600. Its totient is φ = 62847631610880.

The previous prime is 128278234256413. The next prime is 128278234256483. The reversal of 128278234256416 is 614652432872821.

It is a Harshad number since it is a multiple of its sum of digits (61).

It is not an unprimeable number, because it can be changed into a prime (128278234256413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 627147570 + ... + 627352078.

It is an arithmetic number, because the mean of its divisors is an integer number (2684021961600).

Almost surely, 2^{128278234256416} is an apocalyptic number.

128278234256416 is a gapful number since it is divisible by the number (16) 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 128278234256416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128833054156800).

128278234256416 is an abundant number, since it is smaller than the sum of its proper divisors (129387874057184).

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

128278234256416 is a wasteful number, since it uses less digits than its factorization.

128278234256416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205802 (or 205794 counting only the distinct ones).

The product of its digits is 61931520, while the sum is 61.

The spelling of 128278234256416 in words is "one hundred twenty-eight trillion, two hundred seventy-eight billion, two hundred thirty-four million, two hundred fifty-six thousand, four hundred sixteen".