128197230512 has 20 divisors (see below), whose sum is σ = 267488452560. Its totient is φ = 59167952448.

The previous prime is 128197230449. The next prime is 128197230589. The reversal of 128197230512 is 215032791821.

It is a self number, because there is not a number n which added to its sum of digits gives 128197230512.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308166212 + ... + 308166627.

It is an arithmetic number, because the mean of its divisors is an integer number (13374422628).

Almost surely, 2^128197230512 is an apocalyptic number.

It is an amenable number.

128197230512 is an abundant number, since it is smaller than the sum of its proper divisors (139291222048).

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

128197230512 is a wasteful number, since it uses less digits than its factorization.

128197230512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616332860 (or 616332854 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 41.

The spelling of 128197230512 in words is "one hundred twenty-eight billion, one hundred ninety-seven million, two hundred thirty thousand, five hundred twelve".