646234132172 has 12 divisors (see below), whose sum is σ = 1161474859440. Its totient is φ = 314384172336.

The previous prime is 646234132171. The next prime is 646234132273. The reversal of 646234132172 is 271231432646.

It is not an unprimeable number, because it can be changed into a prime (646234132171) 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, 2183223272 + ... + 2183223567.

It is an arithmetic number, because the mean of its divisors is an integer number (96789571620).

Almost surely, 2^646234132172 is an apocalyptic number.

It is an amenable number.

646234132172 is a deficient number, since it is larger than the sum of its proper divisors (515240727268).

646234132172 is a wasteful number, since it uses less digits than its factorization.

646234132172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4366446880 (or 4366446878 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The spelling of 646234132172 in words is "six hundred forty-six billion, two hundred thirty-four million, one hundred thirty-two thousand, one hundred seventy-two".