321324664646 has 4 divisors (see below), whose sum is σ = 481986996972. Its totient is φ = 160662332322.

The previous prime is 321324664631. The next prime is 321324664667. The reversal of 321324664646 is 646466423123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 646466423123 = 661 ⋅978012743.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 321324664646.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80331166160 + ... + 80331166163.

It is an arithmetic number, because the mean of its divisors is an integer number (120496749243).

Almost surely, 2^321324664646 is an apocalyptic number.

321324664646 is a deficient number, since it is larger than the sum of its proper divisors (160662332326).

321324664646 is a wasteful number, since it uses less digits than its factorization.

321324664646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160662332325.

The product of its digits is 2985984, while the sum is 47.

The spelling of 321324664646 in words is "three hundred twenty-one billion, three hundred twenty-four million, six hundred sixty-four thousand, six hundred forty-six".