33139006865 has 8 divisors (see below), whose sum is σ = 42106032360. Its totient is φ = 24951722752.

The previous prime is 33139006847. The next prime is 33139006877. The reversal of 33139006865 is 56860093133.

It can be written as a sum of positive squares in 4 ways, for example, as 6086652289 + 27052354576 = 78017^2 + 164476^2 .

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 33139006865 - 2²⁰ = 33137958289 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194935250 + ... + 194935419.

It is an arithmetic number, because the mean of its divisors is an integer number (5263254045).

Almost surely, 2^33139006865 is an apocalyptic number.

It is an amenable number.

33139006865 is a deficient number, since it is larger than the sum of its proper divisors (8967025495).

33139006865 is a wasteful number, since it uses less digits than its factorization.

33139006865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389870691.

The product of its (nonzero) digits is 349920, while the sum is 44.

Adding to 33139006865 its reverse (56860093133), we get a palindrome (89999099998).

The spelling of 33139006865 in words is "thirty-three billion, one hundred thirty-nine million, six thousand, eight hundred sixty-five".