128545581966 has 32 divisors (see below), whose sum is σ = 264063575328. Its totient is φ = 41686669440.

The previous prime is 128545581911. The next prime is 128545581971. The reversal of 128545581966 is 669185545821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3458256 + ... + 3495228.

It is an arithmetic number, because the mean of its divisors is an integer number (8251986729).

Almost surely, 2^128545581966 is an apocalyptic number.

128545581966 is an abundant number, since it is smaller than the sum of its proper divisors (135517993362).

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

128545581966 is a wasteful number, since it uses less digits than its factorization.

128545581966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52676.

The product of its digits is 20736000, while the sum is 60.

The spelling of 128545581966 in words is "one hundred twenty-eight billion, five hundred forty-five million, five hundred eighty-one thousand, nine hundred sixty-six".