33128679889 has 8 divisors (see below), whose sum is σ = 34881086240. Its totient is φ = 31377152736.

The previous prime is 33128679877. The next prime is 33128679919. The reversal of 33128679889 is 98897682133.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33128679889 - 2²⁷ = 32994462161 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 33128679889.

It is not an unprimeable number, because it can be changed into a prime (33128649889) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 141732 + ... + 293845.

It is an arithmetic number, because the mean of its divisors is an integer number (4360135780).

Almost surely, 2^33128679889 is an apocalyptic number.

It is an amenable number.

33128679889 is a deficient number, since it is larger than the sum of its proper divisors (1752406351).

33128679889 is a wasteful number, since it uses less digits than its factorization.

33128679889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439599.

The product of its digits is 31352832, while the sum is 64.

The spelling of 33128679889 in words is "thirty-three billion, one hundred twenty-eight million, six hundred seventy-nine thousand, eight hundred eighty-nine".