33439894388129 has 4 divisors (see below), whose sum is σ = 33439919315220. Its totient is φ = 33439869461040.

The previous prime is 33439894388093. The next prime is 33439894388161. The reversal of 33439894388129 is 92188349893433.

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 4390198278400 + 29049696109729 = 2095280^2 + 5389777^2 .

It is a cyclic number.

It is not a de Polignac number, because 33439894388129 - 2⁴⁰ = 32340382760353 is a prime.

It is a super-2 number, since 2×33439894388129² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33439594388129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10329482 + ... + 13174899.

It is an arithmetic number, because the mean of its divisors is an integer number (8359979828805).

Almost surely, 2^{33439894388129} is an apocalyptic number.

It is an amenable number.

33439894388129 is a deficient number, since it is larger than the sum of its proper divisors (24927091).

33439894388129 is a wasteful number, since it uses less digits than its factorization.

33439894388129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24927090.

The product of its digits is 967458816, while the sum is 74.

The spelling of 33439894388129 in words is "thirty-three trillion, four hundred thirty-nine billion, eight hundred ninety-four million, three hundred eighty-eight thousand, one hundred twenty-nine".