138633684466 has 8 divisors (see below), whose sum is σ = 208019599344. Its totient is φ = 69293818020.

The previous prime is 138633684367. The next prime is 138633684487. The reversal of 138633684466 is 664486336831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 138633684466.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11504580 + ... + 11516623.

It is an arithmetic number, because the mean of its divisors is an integer number (26002449918).

Almost surely, 2^138633684466 is an apocalyptic number.

138633684466 is a deficient number, since it is larger than the sum of its proper divisors (69385914878).

138633684466 is a wasteful number, since it uses less digits than its factorization.

138633684466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23024216.

The product of its digits is 35831808, while the sum is 58.

The spelling of 138633684466 in words is "one hundred thirty-eight billion, six hundred thirty-three million, six hundred eighty-four thousand, four hundred sixty-six".