320617545361 has 3 divisors (see below), whose sum is σ = 320618111593. Its totient is φ = 320616979130.

The previous prime is 320617545341. The next prime is 320617545373. The reversal of 320617545361 is 163545716023.

The square root of 320617545361 is 566231.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 320617545361 - 2⁵ = 320617545329 is a prime.

It is a super-2 number, since 2×320617545361² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320617545301) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 283116 + ... + 849346.

Almost surely, 2^320617545361 is an apocalyptic number.

320617545361 is the 566231-st square number.

320617545361 is the 283116-th centered octagonal number.

It is an amenable number.

320617545361 is a deficient number, since it is larger than the sum of its proper divisors (566232).

320617545361 is an frugal number, since it uses more digits than its factorization.

320617545361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132462 (or 566231 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 43.

The spelling of 320617545361 in words is "three hundred twenty billion, six hundred seventeen million, five hundred forty-five thousand, three hundred sixty-one".