320543409652 has 24 divisors (see below), whose sum is σ = 576172625000. Its totient is φ = 155923574400.

The previous prime is 320543409647. The next prime is 320543409661. The reversal of 320543409652 is 256904345023.

It can be written as a sum of positive squares in 4 ways, for example, as 220640636176 + 99902773476 = 469724^2 + 316074^2 .

It is a super-2 number, since 2×320543409652² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320543409599 and 320543409608.

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 in 7 ways as a sum of consecutive naturals, for example, 1355974 + ... + 1574722.

Almost surely, 2^320543409652 is an apocalyptic number.

It is an amenable number.

320543409652 is a deficient number, since it is larger than the sum of its proper divisors (255629215348).

320543409652 is a wasteful number, since it uses less digits than its factorization.

320543409652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228691 (or 228689 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 43.

The spelling of 320543409652 in words is "three hundred twenty billion, five hundred forty-three million, four hundred nine thousand, six hundred fifty-two".