320523165243 has 12 divisors (see below), whose sum is σ = 469320069400. Its totient is φ = 210754957536.

The previous prime is 320523165227. The next prime is 320523165251. The reversal of 320523165243 is 342561325023.

320523165243 is a `hidden beast` number, since 32 + 0 + 523 + 1 + 65 + 2 + 43 = 666.

It is not a de Polignac number, because 320523165243 - 2⁴ = 320523165227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320523165198 and 320523165207.

It is not an unprimeable number, because it can be changed into a prime (320523165203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 243928693 + ... + 243930006.

Almost surely, 2^320523165243 is an apocalyptic number.

320523165243 is a deficient number, since it is larger than the sum of its proper divisors (148796904157).

320523165243 is a wasteful number, since it uses less digits than its factorization.

320523165243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487858778 (or 487858775 counting only the distinct ones).

The product of its (nonzero) digits is 129600, while the sum is 36.

The spelling of 320523165243 in words is "three hundred twenty billion, five hundred twenty-three million, one hundred sixty-five thousand, two hundred forty-three".