321261359445852 has 384 divisors, whose sum is σ = 897995273011200. Its totient is φ = 87492873661440.

The previous prime is 321261359445811. The next prime is 321261359445881. The reversal of 321261359445852 is 258544953162123.

It is a happy number.

It is a super-2 number, since 2×321261359445852² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 76290988027 + ... + 76290992237.

It is an arithmetic number, because the mean of its divisors is an integer number (2338529356800).

Almost surely, 2^{321261359445852} 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 321261359445852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (448997636505600).

321261359445852 is an abundant number, since it is smaller than the sum of its proper divisors (576733913565348).

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

321261359445852 is a wasteful number, since it uses less digits than its factorization.

321261359445852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6921 (or 6919 counting only the distinct ones).

The product of its digits is 62208000, while the sum is 60.

The spelling of 321261359445852 in words is "three hundred twenty-one trillion, two hundred sixty-one billion, three hundred fifty-nine million, four hundred forty-five thousand, eight hundred fifty-two".