33506857189 has 4 divisors (see below), whose sum is σ = 36084307756. Its totient is φ = 30929406624.

The previous prime is 33506857177. The next prime is 33506857211. The reversal of 33506857189 is 98175860533.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8270993025 + 25235864164 = 90945^2 + 158858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33506857189 is a prime.

It is a super-2 number, since 2×33506857189² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33506857169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1288725264 + ... + 1288725289.

It is an arithmetic number, because the mean of its divisors is an integer number (9021076939).

Almost surely, 2^33506857189 is an apocalyptic number.

It is an amenable number.

33506857189 is a deficient number, since it is larger than the sum of its proper divisors (2577450567).

33506857189 is a wasteful number, since it uses less digits than its factorization.

33506857189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2577450566.

The product of its (nonzero) digits is 5443200, while the sum is 55.

The spelling of 33506857189 in words is "thirty-three billion, five hundred six million, eight hundred fifty-seven thousand, one hundred eighty-nine".