128564658432 has 144 divisors (see below), whose sum is σ = 434501092480. Its totient is φ = 36732745728.

The previous prime is 128564658421. The next prime is 128564658437. The reversal of 128564658432 is 234856465821.

128564658432 is a `hidden beast` number, since 1 + 2 + 8 + 56 + 4 + 6 + 584 + 3 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (128564658437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1280203 + ... + 1376970.

Almost surely, 2^128564658432 is an apocalyptic number.

128564658432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128564658432 is an abundant number, since it is smaller than the sum of its proper divisors (305936434048).

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

128564658432 is an equidigital number, since it uses as much as digits as its factorization.

128564658432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2657205 (or 2657185 counting only the distinct ones).

The product of its digits is 11059200, while the sum is 54.

The spelling of 128564658432 in words is "one hundred twenty-eight billion, five hundred sixty-four million, six hundred fifty-eight thousand, four hundred thirty-two".