320545643 has 16 divisors (see below), whose sum is σ = 362361600. Its totient is φ = 281030880.

The previous prime is 320545639. The next prime is 320545649. The reversal of 320545643 is 346545023.

It is a cyclic number.

It is not a de Polignac number, because 320545643 - 2² = 320545639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320545649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29738 + ... + 39056.

It is an arithmetic number, because the mean of its divisors is an integer number (22647600).

Almost surely, 2^320545643 is an apocalyptic number.

320545643 is a deficient number, since it is larger than the sum of its proper divisors (41815957).

320545643 is a wasteful number, since it uses less digits than its factorization.

320545643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9442.

The product of its (nonzero) digits is 43200, while the sum is 32.

The square root of 320545643 is about 17903.7885096982. The cubic root of 320545643 is about 684.3789230831.

The spelling of 320545643 in words is "three hundred twenty million, five hundred forty-five thousand, six hundred forty-three".