3638855506 has 64 divisors (see below), whose sum is σ = 6561015552. Its totient is φ = 1504272000.

The previous prime is 3638855497. The next prime is 3638855527. The reversal of 3638855506 is 6055588363.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3638855506.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2456286 + ... + 2457766.

It is an arithmetic number, because the mean of its divisors is an integer number (102515868).

Almost surely, 2^3638855506 is an apocalyptic number.

3638855506 is a deficient number, since it is larger than the sum of its proper divisors (2922160046).

3638855506 is a wasteful number, since it uses less digits than its factorization.

3638855506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1578 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 49.

The square root of 3638855506 is about 60322.9268686459. The cubic root of 3638855506 is about 1538.1130971579.

The spelling of 3638855506 in words is "three billion, six hundred thirty-eight million, eight hundred fifty-five thousand, five hundred six".