128919254528 has 80 divisors (see below), whose sum is σ = 260204845824. Its totient is φ = 63807744000.

The previous prime is 128919254509. The next prime is 128919254543. The reversal of 128919254528 is 825452919821.

It is a congruent number.

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, 21458501 + ... + 21464507.

Almost surely, 2^128919254528 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 128919254528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130102422912).

128919254528 is an abundant number, since it is smaller than the sum of its proper divisors (131285591296).

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

128919254528 is an equidigital number, since it uses as much as digits as its factorization.

128919254528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443 (or 6427 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 56.

The spelling of 128919254528 in words is "one hundred twenty-eight billion, nine hundred nineteen million, two hundred fifty-four thousand, five hundred twenty-eight".