128839171488 has 48 divisors (see below), whose sum is σ = 338360452416. Its totient is φ = 42926374400.

The previous prime is 128839171469. The next prime is 128839171499. The reversal of 128839171488 is 884171938821.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104988 + ... + 518363.

It is an arithmetic number, because the mean of its divisors is an integer number (7049176092).

Almost surely, 2^128839171488 is an apocalyptic number.

It is an amenable number.

128839171488 is an abundant number, since it is smaller than the sum of its proper divisors (209521280928).

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

128839171488 is a wasteful number, since it uses less digits than its factorization.

128839171488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625517 (or 625509 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 60.

The spelling of 128839171488 in words is "one hundred twenty-eight billion, eight hundred thirty-nine million, one hundred seventy-one thousand, four hundred eighty-eight".