321543411456 has 72 divisors (see below), whose sum is σ = 856831260544. Its totient is φ = 107048770560.

The previous prime is 321543411439. The next prime is 321543411523. The reversal of 321543411456 is 654114345123.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 364725 + ... + 880971.

Almost surely, 2^321543411456 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 321543411456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (428415630272).

321543411456 is an abundant number, since it is smaller than the sum of its proper divisors (535287849088).

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

321543411456 is an equidigital number, since it uses as much as digits as its factorization.

321543411456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517077 (or 517063 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

Adding to 321543411456 its reverse (654114345123), we get a palindrome (975657756579).

The spelling of 321543411456 in words is "three hundred twenty-one billion, five hundred forty-three million, four hundred eleven thousand, four hundred fifty-six".