321244541540 has 96 divisors (see below), whose sum is σ = 758604220416. Its totient is φ = 113379932160.

The previous prime is 321244541521. The next prime is 321244541551. The reversal of 321244541540 is 45145442123.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 321244541540.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 9269645 + ... + 9304235.

It is an arithmetic number, because the mean of its divisors is an integer number (7902127296).

Almost surely, 2^321244541540 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 321244541540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (379302110208).

321244541540 is an abundant number, since it is smaller than the sum of its proper divisors (437359678876).

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

321244541540 is a wasteful number, since it uses less digits than its factorization.

321244541540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36189 (or 36187 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 35.

Adding to 321244541540 its reverse (45145442123), we get a palindrome (366389983663).

The spelling of 321244541540 in words is "three hundred twenty-one billion, two hundred forty-four million, five hundred forty-one thousand, five hundred forty".