320997564905 has 8 divisors (see below), whose sum is σ = 385363771584. Its totient is φ = 256686922800.

The previous prime is 320997564851. The next prime is 320997564919. The reversal of 320997564905 is 509465799023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 320997564905 - 2¹⁶ = 320997499369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13878431 + ... + 13901540.

It is an arithmetic number, because the mean of its divisors is an integer number (48170471448).

Almost surely, 2^320997564905 is an apocalyptic number.

It is an amenable number.

320997564905 is a deficient number, since it is larger than the sum of its proper divisors (64366206679).

320997564905 is a wasteful number, since it uses less digits than its factorization.

320997564905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27782287.

The product of its (nonzero) digits is 18370800, while the sum is 59.

The spelling of 320997564905 in words is "three hundred twenty billion, nine hundred ninety-seven million, five hundred sixty-four thousand, nine hundred five".