320456840209 has 16 divisors (see below), whose sum is σ = 350234850240. Its totient is φ = 290786728960.

The previous prime is 320456840191. The next prime is 320456840279. The reversal of 320456840209 is 902048654023.

It is a cyclic number.

It is not a de Polignac number, because 320456840209 - 2¹⁵ = 320456807441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320456840279) 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, 31433817 + ... + 31444009.

It is an arithmetic number, because the mean of its divisors is an integer number (21889678140).

Almost surely, 2^320456840209 is an apocalyptic number.

It is an amenable number.

320456840209 is a deficient number, since it is larger than the sum of its proper divisors (29778010031).

320456840209 is a wasteful number, since it uses less digits than its factorization.

320456840209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15200.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 320456840209 in words is "three hundred twenty billion, four hundred fifty-six million, eight hundred forty thousand, two hundred nine".