6489579538 has 16 divisors (see below), whose sum is σ = 10484674200. Its totient is φ = 2994759936.

The previous prime is 6489579529. The next prime is 6489579571. The reversal of 6489579538 is 8359759846.

It can be written as a sum of positive squares in 4 ways, for example, as 3253903849 + 3235675689 = 57043^2 + 56883^2 .

It is a super-2 number, since 2×6489579538² = 84229285160056586888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6489579538.

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, 232138 + ... + 258586.

Almost surely, 2^6489579538 is an apocalyptic number.

6489579538 is a deficient number, since it is larger than the sum of its proper divisors (3995094662).

6489579538 is a wasteful number, since it uses less digits than its factorization.

6489579538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35901.

The product of its digits is 65318400, while the sum is 64.

The square root of 6489579538 is about 80557.9265994353. The cubic root of 6489579538 is about 1865.2577503638.

The spelling of 6489579538 in words is "six billion, four hundred eighty-nine million, five hundred seventy-nine thousand, five hundred thirty-eight".