639594166846 has 8 divisors (see below), whose sum is σ = 968357523960. Its totient is φ = 316808325528.

The previous prime is 639594166843. The next prime is 639594166847. The reversal of 639594166846 is 648661495936.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (639594166843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1494378681 + ... + 1494379108.

It is an arithmetic number, because the mean of its divisors is an integer number (121044690495).

Almost surely, 2^639594166846 is an apocalyptic number.

639594166846 is a deficient number, since it is larger than the sum of its proper divisors (328763357114).

639594166846 is a wasteful number, since it uses less digits than its factorization.

639594166846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2988757898.

The product of its digits is 201553920, while the sum is 67.

The spelling of 639594166846 in words is "six hundred thirty-nine billion, five hundred ninety-four million, one hundred sixty-six thousand, eight hundred forty-six".