321643330621325 has 12 divisors (see below), whose sum is σ = 399108863755008. Its totient is φ = 257139739474800.

The previous prime is 321643330621313. The next prime is 321643330621331. The reversal of 321643330621325 is 523126033346123.

It is a de Polignac number, because none of the positive numbers 2^k-321643330621325 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4373088047 + ... + 4373161596.

It is an arithmetic number, because the mean of its divisors is an integer number (33259071979584).

Almost surely, 2^{321643330621325} is an apocalyptic number.

It is an amenable number.

321643330621325 is a deficient number, since it is larger than the sum of its proper divisors (77465533133683).

321643330621325 is a wasteful number, since it uses less digits than its factorization.

321643330621325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8746251124 (or 8746251119 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 44.

Adding to 321643330621325 its reverse (523126033346123), we get a palindrome (844769363967448).

The spelling of 321643330621325 in words is "three hundred twenty-one trillion, six hundred forty-three billion, three hundred thirty million, six hundred twenty-one thousand, three hundred twenty-five".