6438336165 has 32 divisors (see below), whose sum is σ = 11451888000. Its totient is φ = 3431992320.

The previous prime is 6438336133. The next prime is 6438336167. The reversal of 6438336165 is 5616338346.

6438336165 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6438336165 - 2⁵ = 6438336133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6438336165.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6438336167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272005 + ... + 294725.

It is an arithmetic number, because the mean of its divisors is an integer number (357871500).

Almost surely, 2^6438336165 is an apocalyptic number.

It is an amenable number.

6438336165 is a deficient number, since it is larger than the sum of its proper divisors (5013551835).

6438336165 is a wasteful number, since it uses less digits than its factorization.

6438336165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24834 (or 24828 counting only the distinct ones).

The product of its digits is 933120, while the sum is 45.

The square root of 6438336165 is about 80239.2432977779. The cubic root of 6438336165 is about 1860.3352543450.

The spelling of 6438336165 in words is "six billion, four hundred thirty-eight million, three hundred thirty-six thousand, one hundred sixty-five".