6638009536 has 28 divisors (see below), whose sum is σ = 13308109528. Its totient is φ = 3284785152.

The previous prime is 6638009513. The next prime is 6638009551. The reversal of 6638009536 is 6359008366.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528426 + ... + 540841.

It is an arithmetic number, because the mean of its divisors is an integer number (475289626).

Almost surely, 2^6638009536 is an apocalyptic number.

It is an amenable number.

6638009536 is an abundant number, since it is smaller than the sum of its proper divisors (6670099992).

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

6638009536 is a wasteful number, since it uses less digits than its factorization.

6638009536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069376 (or 1069366 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 46.

The square root of 6638009536 is about 81473.9807300466. The cubic root of 6638009536 is about 1879.3714452232.

The spelling of 6638009536 in words is "six billion, six hundred thirty-eight million, nine thousand, five hundred thirty-six".