33440138405 has 8 divisors (see below), whose sum is σ = 42488646552. Its totient is φ = 25178457088.

The previous prime is 33440138359. The next prime is 33440138443. The reversal of 33440138405 is 50483104433.

It can be written as a sum of positive squares in 4 ways, for example, as 3762840964 + 29677297441 = 61342^2 + 172271^2 .

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 33440138405 - 2²⁴ = 33423361189 is a prime.

It is a super-2 number, since 2×33440138405² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 196706612 + ... + 196706781.

It is an arithmetic number, because the mean of its divisors is an integer number (5311080819).

Almost surely, 2^33440138405 is an apocalyptic number.

It is an amenable number.

33440138405 is a deficient number, since it is larger than the sum of its proper divisors (9048508147).

33440138405 is a wasteful number, since it uses less digits than its factorization.

33440138405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393413415.

The product of its (nonzero) digits is 69120, while the sum is 35.

The spelling of 33440138405 in words is "thirty-three billion, four hundred forty million, one hundred thirty-eight thousand, four hundred five".