438165644788686 has 16 divisors (see below), whose sum is σ = 876856353282000. Its totient is φ = 145967704312128.

The previous prime is 438165644788639. The next prime is 438165644788727. The reversal of 438165644788686 is 686887446561834.

It is a junction number, because it is equal to n+sod(n) for n = 438165644788599 and 438165644788608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21877643511 + ... + 21877663538.

It is an arithmetic number, because the mean of its divisors is an integer number (54803522080125).

Almost surely, 2^{438165644788686} is an apocalyptic number.

438165644788686 is an abundant number, since it is smaller than the sum of its proper divisors (438690708493314).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438165644788686 is a wasteful number, since it uses less digits than its factorization.

438165644788686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43755308723.

The product of its digits is 35672555520, while the sum is 84.

The spelling of 438165644788686 in words is "four hundred thirty-eight trillion, one hundred sixty-five billion, six hundred forty-four million, seven hundred eighty-eight thousand, six hundred eighty-six".