321455318689 has 4 divisors (see below), whose sum is σ = 321470935600. Its totient is φ = 321439701780.

The previous prime is 321455318671. The next prime is 321455318759. The reversal of 321455318689 is 986813554123.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986813554123 = 877 ⋅1125214999.

It is a cyclic number.

It is not a de Polignac number, because 321455318689 - 2¹⁷ = 321455187617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321455318609) 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 3 ways as a sum of consecutive naturals, for example, 7777539 + ... + 7818760.

It is an arithmetic number, because the mean of its divisors is an integer number (80367733900).

Almost surely, 2^321455318689 is an apocalyptic number.

It is an amenable number.

321455318689 is a deficient number, since it is larger than the sum of its proper divisors (15616911).

321455318689 is a wasteful number, since it uses less digits than its factorization.

321455318689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15616910.

The product of its digits is 6220800, while the sum is 55.

The spelling of 321455318689 in words is "three hundred twenty-one billion, four hundred fifty-five million, three hundred eighteen thousand, six hundred eighty-nine".