128449471488 has 176 divisors, whose sum is σ = 390390739200. Its totient is φ = 37197840384.

The previous prime is 128449471433. The next prime is 128449471489. The reversal of 128449471488 is 884174944821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (128449471489) 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, 584313 + ... + 773511.

It is an arithmetic number, because the mean of its divisors is an integer number (2218129200).

Almost surely, 2^128449471488 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 128449471488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195195369600).

128449471488 is an abundant number, since it is smaller than the sum of its proper divisors (261941267712).

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

128449471488 is a wasteful number, since it uses less digits than its factorization.

128449471488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189252 (or 189234 counting only the distinct ones).

The product of its digits is 16515072, while the sum is 60.

The spelling of 128449471488 in words is "one hundred twenty-eight billion, four hundred forty-nine million, four hundred seventy-one thousand, four hundred eighty-eight".