128769433185143 has 4 divisors (see below), whose sum is σ = 128782260113520. Its totient is φ = 128756606256768.

The previous prime is 128769433185137. The next prime is 128769433185161. The reversal of 128769433185143 is 341581334967821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128769433185143 - 2⁶ = 128769433185079 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 128769433185143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128769433185103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6413449130 + ... + 6413469207.

It is an arithmetic number, because the mean of its divisors is an integer number (32195565028380).

Almost surely, 2^{128769433185143} is an apocalyptic number.

128769433185143 is a deficient number, since it is larger than the sum of its proper divisors (12826928377).

128769433185143 is a wasteful number, since it uses less digits than its factorization.

128769433185143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12826928376.

The product of its digits is 104509440, while the sum is 65.

The spelling of 128769433185143 in words is "one hundred twenty-eight trillion, seven hundred sixty-nine billion, four hundred thirty-three million, one hundred eighty-five thousand, one hundred forty-three".