321043040440 has 16 divisors (see below), whose sum is σ = 722346841080. Its totient is φ = 128417216160.

The previous prime is 321043040399. The next prime is 321043040467. The reversal of 321043040440 is 44040340123.

It is a congruent number.

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, 4013037966 + ... + 4013038045.

Almost surely, 2^321043040440 is an apocalyptic number.

It is an amenable number.

321043040440 is an abundant number, since it is smaller than the sum of its proper divisors (401303800640).

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

321043040440 is a wasteful number, since it uses less digits than its factorization.

321043040440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026076022 (or 8026076018 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 321043040440 its reverse (44040340123), we get a palindrome (365083380563).

The spelling of 321043040440 in words is "three hundred twenty-one billion, forty-three million, forty thousand, four hundred forty".