321160536665 has 4 divisors (see below), whose sum is σ = 385392644004. Its totient is φ = 256928429328.

The previous prime is 321160536623. The next prime is 321160536673. The reversal of 321160536665 is 566635061123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 238268944384 + 82891592281 = 488128^2 + 287909^2 .

It is a cyclic number.

It is not a de Polignac number, because 321160536665 - 2²⁴ = 321143759449 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32116053662 + ... + 32116053671.

It is an arithmetic number, because the mean of its divisors is an integer number (96348161001).

Almost surely, 2^321160536665 is an apocalyptic number.

It is an amenable number.

321160536665 is a deficient number, since it is larger than the sum of its proper divisors (64232107339).

321160536665 is an equidigital number, since it uses as much as digits as its factorization.

321160536665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64232107338.

The product of its (nonzero) digits is 583200, while the sum is 44.

Adding to 321160536665 its reverse (566635061123), we get a palindrome (887795597788).

The spelling of 321160536665 in words is "three hundred twenty-one billion, one hundred sixty million, five hundred thirty-six thousand, six hundred sixty-five".