321305004520000 has 70 divisors (see below), whose sum is σ = 796731987182318. Its totient is φ = 128522001792000.

The previous prime is 321305004519979. The next prime is 321305004520009. The reversal of 321305004520000 is 25400503123.

It can be written as a sum of positive squares in 5 ways, for example, as 53850118533696 + 267454885986304 = 7338264^2 + 16354048^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (321305004520009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4016272557 + ... + 4016352556.

Almost surely, 2^{321305004520000} is an apocalyptic number.

It is an amenable number.

321305004520000 is an abundant number, since it is smaller than the sum of its proper divisors (475426982662318).

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

321305004520000 is an frugal number, since it uses more digits than its factorization.

321305004520000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8032625145 (or 8032625120 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 321305004520000 in words is "three hundred twenty-one trillion, three hundred five billion, four million, five hundred twenty thousand".