128002665979 has 16 divisors (see below), whose sum is σ = 135863904960. Its totient is φ = 120178539520.

The previous prime is 128002665943. The next prime is 128002666007. The reversal of 128002665979 is 979566200821.

It is a cyclic number.

It is not a de Polignac number, because 128002665979 - 2¹⁵ = 128002633211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128002665929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32086917 + ... + 32090905.

It is an arithmetic number, because the mean of its divisors is an integer number (8491494060).

Almost surely, 2^128002665979 is an apocalyptic number.

128002665979 is a deficient number, since it is larger than the sum of its proper divisors (7861238981).

128002665979 is a wasteful number, since it uses less digits than its factorization.

128002665979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8150.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The spelling of 128002665979 in words is "one hundred twenty-eight billion, two million, six hundred sixty-five thousand, nine hundred seventy-nine".