128887809412 has 48 divisors (see below), whose sum is σ = 229024635840. Its totient is φ = 63462371328.

The previous prime is 128887809373. The next prime is 128887809419. The reversal of 128887809412 is 214908788821.

128887809412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128887809412² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128887809419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32195803 + ... + 32199805.

It is an arithmetic number, because the mean of its divisors is an integer number (4771346580).

Almost surely, 2^128887809412 is an apocalyptic number.

It is an amenable number.

128887809412 is a deficient number, since it is larger than the sum of its proper divisors (100136826428).

128887809412 is a wasteful number, since it uses less digits than its factorization.

128887809412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4612 (or 4610 counting only the distinct ones).

The product of its (nonzero) digits is 4128768, while the sum is 58.

The spelling of 128887809412 in words is "one hundred twenty-eight billion, eight hundred eighty-seven million, eight hundred nine thousand, four hundred twelve".