1638445435334 has 16 divisors (see below), whose sum is σ = 2588490805248. Its totient is φ = 776280931272.

The previous prime is 1638445435321. The next prime is 1638445435343. The reversal of 1638445435334 is 4335345448361.

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, 166436102 + ... + 166445945.

It is an arithmetic number, because the mean of its divisors is an integer number (161780675328).

Almost surely, 2^{1638445435334} is an apocalyptic number.

1638445435334 is a deficient number, since it is larger than the sum of its proper divisors (950045369914).

1638445435334 is a wasteful number, since it uses less digits than its factorization.

1638445435334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332882179.

The product of its digits is 24883200, while the sum is 53.

The spelling of 1638445435334 in words is "one trillion, six hundred thirty-eight billion, four hundred forty-five million, four hundred thirty-five thousand, three hundred thirty-four".