321142321544 has 64 divisors (see below), whose sum is σ = 671256080640. Its totient is φ = 142783234560.

The previous prime is 321142321543. The next prime is 321142321561. The reversal of 321142321544 is 445123241123.

It is a self number, because there is not a number n which added to its sum of digits gives 321142321544.

It is not an unprimeable number, because it can be changed into a prime (321142321541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7228262 + ... + 7272554.

It is an arithmetic number, because the mean of its divisors is an integer number (10488376260).

Almost surely, 2^321142321544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321142321544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335628040320).

321142321544 is an abundant number, since it is smaller than the sum of its proper divisors (350113759096).

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

321142321544 is a wasteful number, since it uses less digits than its factorization.

321142321544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46110 (or 46106 counting only the distinct ones).

The product of its digits is 23040, while the sum is 32.

Adding to 321142321544 its reverse (445123241123), we get a palindrome (766265562667).

The spelling of 321142321544 in words is "three hundred twenty-one billion, one hundred forty-two million, three hundred twenty-one thousand, five hundred forty-four".