320485281387 has 16 divisors (see below), whose sum is σ = 445934384640. Its totient is φ = 204348258752.

The previous prime is 320485281379. The next prime is 320485281407. The reversal of 320485281387 is 783182584023.

It is a cyclic number.

It is not a de Polignac number, because 320485281387 - 2³ = 320485281379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320485281377) 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, 542314 + ... + 966992.

It is an arithmetic number, because the mean of its divisors is an integer number (27870899040).

Almost surely, 2^320485281387 is an apocalyptic number.

320485281387 is a deficient number, since it is larger than the sum of its proper divisors (125449103253).

320485281387 is a wasteful number, since it uses less digits than its factorization.

320485281387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435642.

The product of its (nonzero) digits is 2580480, while the sum is 51.

The spelling of 320485281387 in words is "three hundred twenty billion, four hundred eighty-five million, two hundred eighty-one thousand, three hundred eighty-seven".