128418520208 has 80 divisors (see below), whose sum is σ = 272891224320. Its totient is φ = 58058726400.

The previous prime is 128418520193. The next prime is 128418520211. The reversal of 128418520208 is 802025814821.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26415698 + ... + 26420558.

It is an arithmetic number, because the mean of its divisors is an integer number (3411140304).

Almost surely, 2^128418520208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128418520208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (136445612160).

128418520208 is an abundant number, since it is smaller than the sum of its proper divisors (144472704112).

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

128418520208 is a wasteful number, since it uses less digits than its factorization.

With its successor (128418520209) it forms an eRAP, since the sums of their prime factors are consecutive (5656 and 5657).

128418520208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5656 (or 5650 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 41.

The spelling of 128418520208 in words is "one hundred twenty-eight billion, four hundred eighteen million, five hundred twenty thousand, two hundred eight".