6438336158 has 16 divisors (see below), whose sum is σ = 9746842560. Its totient is φ = 3189520800.

The previous prime is 6438336133. The next prime is 6438336167. The reversal of 6438336158 is 8516338346.

It is a Curzon 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, 65288 + ... + 130916.

It is an arithmetic number, because the mean of its divisors is an integer number (609177660).

Almost surely, 2^6438336158 is an apocalyptic number.

6438336158 is a deficient number, since it is larger than the sum of its proper divisors (3308506402).

6438336158 is a wasteful number, since it uses less digits than its factorization.

6438336158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66083.

The product of its digits is 1244160, while the sum is 47.

The square root of 6438336158 is about 80239.2432541584. The cubic root of 6438336158 is about 1860.3352536708.

The spelling of 6438336158 in words is "six billion, four hundred thirty-eight million, three hundred thirty-six thousand, one hundred fifty-eight".