128169767039 has 4 divisors (see below), whose sum is σ = 131295858960. Its totient is φ = 125043675120.

The previous prime is 128169767027. The next prime is 128169767053. The reversal of 128169767039 is 930767961821.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128169767039 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 (128169767059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1563045899 + ... + 1563045980.

It is an arithmetic number, because the mean of its divisors is an integer number (32823964740).

Almost surely, 2^128169767039 is an apocalyptic number.

128169767039 is a deficient number, since it is larger than the sum of its proper divisors (3126091921).

128169767039 is an equidigital number, since it uses as much as digits as its factorization.

128169767039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3126091920.

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 128169767039 in words is "one hundred twenty-eight billion, one hundred sixty-nine million, seven hundred sixty-seven thousand, thirty-nine".