128508324744 has 128 divisors (see below), whose sum is σ = 331347542400. Its totient is φ = 41507880960.

The previous prime is 128508324739. The next prime is 128508324793. The reversal of 128508324744 is 447423805821.

It is a junction number, because it is equal to n+sod(n) for n = 128508324693 and 128508324702.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138329272 + ... + 138330200.

It is an arithmetic number, because the mean of its divisors is an integer number (2588652675).

Almost surely, 2^128508324744 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 128508324744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165673771200).

128508324744 is an abundant number, since it is smaller than the sum of its proper divisors (202839217656).

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

128508324744 is a wasteful number, since it uses less digits than its factorization.

128508324744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1783 (or 1779 counting only the distinct ones).

The product of its (nonzero) digits is 1720320, while the sum is 48.

The spelling of 128508324744 in words is "one hundred twenty-eight billion, five hundred eight million, three hundred twenty-four thousand, seven hundred forty-four".