538438666834835 has 16 divisors (see below), whose sum is σ = 707235454450560. Its totient is φ = 391097947155840.

The previous prime is 538438666834823. The next prime is 538438666834841.

538438666834835 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 538438666834835 - 2⁶ = 538438666834771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 538438666834835.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67898945195 + ... + 67898953124.

It is an arithmetic number, because the mean of its divisors is an integer number (44202215903160).

Almost surely, 2^{538438666834835} is an apocalyptic number.

538438666834835 is a deficient number, since it is larger than the sum of its proper divisors (168796787615725).

538438666834835 is a wasteful number, since it uses less digits than its factorization.

538438666834835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135797898398.

The product of its digits is 28665446400, while the sum is 80.

The spelling of 538438666834835 in words is "five hundred thirty-eight trillion, four hundred thirty-eight billion, six hundred sixty-six million, eight hundred thirty-four thousand, eight hundred thirty-five".