6438527986 has 16 divisors (see below), whose sum is σ = 11090288160. Its totient is φ = 2772571680.

The previous prime is 6438527983. The next prime is 6438527999. The reversal of 6438527986 is 6897258346.

It is a self number, because there is not a number n which added to its sum of digits gives 6438527986.

It is not an unprimeable number, because it can be changed into a prime (6438527983) 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 7 ways as a sum of consecutive naturals, for example, 7701171 + ... + 7702006.

It is an arithmetic number, because the mean of its divisors is an integer number (693143010).

Almost surely, 2^6438527986 is an apocalyptic number.

6438527986 is a deficient number, since it is larger than the sum of its proper divisors (4651760174).

6438527986 is a wasteful number, since it uses less digits than its factorization.

6438527986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15403209.

The product of its digits is 17418240, while the sum is 58.

The square root of 6438527986 is about 80240.4385955112. The cubic root of 6438527986 is about 1860.3537295025.

The spelling of 6438527986 in words is "six billion, four hundred thirty-eight million, five hundred twenty-seven thousand, nine hundred eighty-six".