329781616842 has 16 divisors (see below), whose sum is σ = 659630089440. Its totient is φ = 109916062992.

The previous prime is 329781616783. The next prime is 329781616849. The reversal of 329781616842 is 248616187923.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (329781616849) 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 7 ways as a sum of consecutive naturals, for example, 2721417 + ... + 2840012.

It is an arithmetic number, because the mean of its divisors is an integer number (41226880590).

Almost surely, 2^329781616842 is an apocalyptic number.

329781616842 is an abundant number, since it is smaller than the sum of its proper divisors (329848472598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

329781616842 is a wasteful number, since it uses less digits than its factorization.

329781616842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5571317.

The product of its digits is 6967296, while the sum is 57.

The spelling of 329781616842 in words is "three hundred twenty-nine billion, seven hundred eighty-one million, six hundred sixteen thousand, eight hundred forty-two".