321969995776 has 405 divisors, whose sum is σ = 791933400909. Its totient is φ = 130734489600.

The previous prime is 321969995773. The next prime is 321969995863. The reversal of 321969995776 is 677599969123.

The square root of 321969995776 is 567424.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 47628697600 + 274341298176 = 218240^2 + 523776^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321969995699 and 321969995708.

It is not an unprimeable number, because it can be changed into a prime (321969995773) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 10386128881 + ... + 10386128911.

Almost surely, 2^321969995776 is an apocalyptic number.

321969995776 is the 567424-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 321969995776

321969995776 is an abundant number, since it is smaller than the sum of its proper divisors (469963405133).

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

321969995776 is an equidigital number, since it uses as much as digits as its factorization.

321969995776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138 (or 57 counting only the distinct ones).

The product of its digits is 347208120, while the sum is 73.

The spelling of 321969995776 in words is "three hundred twenty-one billion, nine hundred sixty-nine million, nine hundred ninety-five thousand, seven hundred seventy-six".