128739659488 has 72 divisors (see below), whose sum is σ = 293255280360. Its totient is φ = 55438099200.

The previous prime is 128739659483. The next prime is 128739659491. The reversal of 128739659488 is 884956937821.

128739659488 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128739659483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 801403 + ... + 948538.

It is an arithmetic number, because the mean of its divisors is an integer number (4072990005).

Almost surely, 2^128739659488 is an apocalyptic number.

It is an amenable number.

128739659488 is an abundant number, since it is smaller than the sum of its proper divisors (164515620872).

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

128739659488 is a wasteful number, since it uses less digits than its factorization.

128739659488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749992 (or 1749973 counting only the distinct ones).

The product of its digits is 209018880, while the sum is 70.

The spelling of 128739659488 in words is "one hundred twenty-eight billion, seven hundred thirty-nine million, six hundred fifty-nine thousand, four hundred eighty-eight".