128928141647 has 4 divisors (see below), whose sum is σ = 130560143520. Its totient is φ = 127296139776.

The previous prime is 128928141581. The next prime is 128928141689. The reversal of 128928141647 is 746141829821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746141829821 = 526573 ⋅1416977.

It is a cyclic number.

It is not a de Polignac number, because 128928141647 - 2²² = 128923947343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128928141047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 816000818 + ... + 816000975.

It is an arithmetic number, because the mean of its divisors is an integer number (32640035880).

Almost surely, 2^128928141647 is an apocalyptic number.

128928141647 is a deficient number, since it is larger than the sum of its proper divisors (1632001873).

128928141647 is an equidigital number, since it uses as much as digits as its factorization.

128928141647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632001872.

The product of its digits is 1548288, while the sum is 53.

The spelling of 128928141647 in words is "one hundred twenty-eight billion, nine hundred twenty-eight million, one hundred forty-one thousand, six hundred forty-seven".