321643763012 has 48 divisors (see below), whose sum is σ = 679154102592. Its totient is φ = 131307972480.

The previous prime is 321643762991. The next prime is 321643763017. The reversal of 321643763012 is 210367346123.

It is not an unprimeable number, because it can be changed into a prime (321643763017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7577678 + ... + 7620005.

It is an arithmetic number, because the mean of its divisors is an integer number (14149043804).

Almost surely, 2^321643763012 is an apocalyptic number.

It is an amenable number.

321643763012 is an abundant number, since it is smaller than the sum of its proper divisors (357510339580).

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

321643763012 is a wasteful number, since it uses less digits than its factorization.

321643763012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15197748 (or 15197746 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 321643763012 in words is "three hundred twenty-one billion, six hundred forty-three million, seven hundred sixty-three thousand, twelve".