321985373644 has 48 divisors (see below), whose sum is σ = 618249937536. Its totient is φ = 145514016000.

The previous prime is 321985373641. The next prime is 321985373659. The reversal of 321985373644 is 446373589123.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (321985373641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5386987 + ... + 5446429.

It is an arithmetic number, because the mean of its divisors is an integer number (12880207032).

Almost surely, 2^321985373644 is an apocalyptic number.

It is an amenable number.

321985373644 is a deficient number, since it is larger than the sum of its proper divisors (296264563892).

321985373644 is a wasteful number, since it uses less digits than its factorization.

321985373644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60166 (or 60164 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 55.

The spelling of 321985373644 in words is "three hundred twenty-one billion, nine hundred eighty-five million, three hundred seventy-three thousand, six hundred forty-four".