128768935433 has 4 divisors (see below), whose sum is σ = 128828033040. Its totient is φ = 128709837828.

The previous prime is 128768935423. The next prime is 128768935453. The reversal of 128768935433 is 334539867821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 334539867821 = 139 ⋅2406761639.

It is a cyclic number.

It is not a de Polignac number, because 128768935433 - 2¹⁰ = 128768934409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128768935423) 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, 29545535 + ... + 29549892.

It is an arithmetic number, because the mean of its divisors is an integer number (32207008260).

Almost surely, 2^128768935433 is an apocalyptic number.

It is an amenable number.

128768935433 is a deficient number, since it is larger than the sum of its proper divisors (59097607).

128768935433 is an equidigital number, since it uses as much as digits as its factorization.

128768935433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59097606.

The product of its digits is 26127360, while the sum is 59.

The spelling of 128768935433 in words is "one hundred twenty-eight billion, seven hundred sixty-eight million, nine hundred thirty-five thousand, four hundred thirty-three".