320545556 has 12 divisors (see below), whose sum is σ = 563363892. Its totient is φ = 159584448.

The previous prime is 320545553. The next prime is 320545567. The reversal of 320545556 is 655545023.

It can be written as a sum of positive squares in 2 ways, for example, as 21808900 + 298736656 = 4670^2 + 17284^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320545553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171035 + ... + 172898.

It is an arithmetic number, because the mean of its divisors is an integer number (46946991).

Almost surely, 2^320545556 is an apocalyptic number.

It is an amenable number.

320545556 is a deficient number, since it is larger than the sum of its proper divisors (242818336).

320545556 is a wasteful number, since it uses less digits than its factorization.

320545556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344170 (or 344168 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 35.

The square root of 320545556 is about 17903.7860800446. The cubic root of 320545556 is about 684.3788611668.

The spelling of 320545556 in words is "three hundred twenty million, five hundred forty-five thousand, five hundred fifty-six".