321055140440 has 16 divisors (see below), whose sum is σ = 722374066080. Its totient is φ = 128422056160.

The previous prime is 321055140353. The next prime is 321055140451. The reversal of 321055140440 is 44041550123.

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, 4013189216 + ... + 4013189295.

It is an arithmetic number, because the mean of its divisors is an integer number (45148379130).

Almost surely, 2^321055140440 is an apocalyptic number.

It is an amenable number.

321055140440 is an abundant number, since it is smaller than the sum of its proper divisors (401318925640).

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

321055140440 is a wasteful number, since it uses less digits than its factorization.

321055140440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8026378522 (or 8026378518 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 321055140440 its reverse (44041550123), we get a palindrome (365096690563).

The spelling of 321055140440 in words is "three hundred twenty-one billion, fifty-five million, one hundred forty thousand, four hundred forty".