128120506624 has 72 divisors (see below), whose sum is σ = 279526336992. Its totient is φ = 58124574720.

The previous prime is 128120506571. The next prime is 128120506637. The reversal of 128120506624 is 426605021821.

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, 1429272 + ... + 1516264.

It is an arithmetic number, because the mean of its divisors is an integer number (3882310236).

Almost surely, 2^128120506624 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 128120506624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139763168496).

128120506624 is an abundant number, since it is smaller than the sum of its proper divisors (151405830368).

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

128120506624 is an equidigital number, since it uses as much as digits as its factorization.

128120506624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87543 (or 87529 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The spelling of 128120506624 in words is "one hundred twenty-eight billion, one hundred twenty million, five hundred six thousand, six hundred twenty-four".