321430545440 has 24 divisors (see below), whose sum is σ = 759379663980. Its totient is φ = 128572218112.

The previous prime is 321430545439. The next prime is 321430545481. The reversal of 321430545440 is 44545034123.

It can be written as a sum of positive squares in 2 ways, for example, as 318335180944 + 3095364496 = 564212^2 + 55636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 321430545440.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1004470295 + ... + 1004470614.

Almost surely, 2^321430545440 is an apocalyptic number.

It is an amenable number.

321430545440 is an abundant number, since it is smaller than the sum of its proper divisors (437949118540).

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

321430545440 is a wasteful number, since it uses less digits than its factorization.

321430545440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008940924 (or 2008940916 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

Adding to 321430545440 its reverse (44545034123), we get a palindrome (365975579563).

The spelling of 321430545440 in words is "three hundred twenty-one billion, four hundred thirty million, five hundred forty-five thousand, four hundred forty".