321350660672 has 112 divisors (see below), whose sum is σ = 658645392384. Its totient is φ = 155463168000.

The previous prime is 321350660641. The next prime is 321350660699. The reversal of 321350660672 is 276066053123.

It is a super-2 number, since 2×321350660672² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210997703 + ... + 210999225.

It is an arithmetic number, because the mean of its divisors is an integer number (5880762432).

Almost surely, 2^321350660672 is an apocalyptic number.

321350660672 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321350660672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329322696192).

321350660672 is an abundant number, since it is smaller than the sum of its proper divisors (337294731712).

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

321350660672 is a wasteful number, since it uses less digits than its factorization.

321350660672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188 (or 2178 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 41.

The spelling of 321350660672 in words is "three hundred twenty-one billion, three hundred fifty million, six hundred sixty thousand, six hundred seventy-two".