128919243530 has 48 divisors (see below), whose sum is σ = 294481223136. Its totient is φ = 40182619680.

The previous prime is 128919243529. The next prime is 128919243559. The reversal of 128919243530 is 35342919821.

128919243530 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11953724 + ... + 11964503.

It is an arithmetic number, because the mean of its divisors is an integer number (6135025482).

Almost surely, 2^128919243530 is an apocalyptic number.

128919243530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128919243530 is an abundant number, since it is smaller than the sum of its proper divisors (165561979606).

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

128919243530 is a wasteful number, since it uses less digits than its factorization.

128919243530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23918259 (or 23918252 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 128919243530 in words is "one hundred twenty-eight billion, nine hundred nineteen million, two hundred forty-three thousand, five hundred thirty".