329556646 has 12 divisors (see below), whose sum is σ = 500646132. Its totient is φ = 162677504.

The previous prime is 329556641. The next prime is 329556697. The reversal of 329556646 is 646655923.

It is a junction number, because it is equal to n+sod(n) for n = 329556596 and 329556605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (329556641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 233190 + ... + 234598.

It is an arithmetic number, because the mean of its divisors is an integer number (41720511).

Almost surely, 2^329556646 is an apocalyptic number.

329556646 is a deficient number, since it is larger than the sum of its proper divisors (171089486).

329556646 is an frugal number, since it uses more digits than its factorization.

329556646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903 (or 1494 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 46.

The square root of 329556646 is about 18153.6951059557. The cubic root of 329556646 is about 690.7327132175.

It can be divided in two parts, 32955 and 6646, that added together give a square (39601 = 199²).

The spelling of 329556646 in words is "three hundred twenty-nine million, five hundred fifty-six thousand, six hundred forty-six".