16320320065 has 16 divisors (see below), whose sum is σ = 22384276992. Its totient is φ = 11190014784.

The previous prime is 16320320021. The next prime is 16320320077. The reversal of 16320320065 is 56002302361.

It is a cyclic number.

It is not a de Polignac number, because 16320320065 - 2¹⁹ = 16319795777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 592632 + ... + 619558.

It is an arithmetic number, because the mean of its divisors is an integer number (1399017312).

Almost surely, 2^16320320065 is an apocalyptic number.

It is an amenable number.

16320320065 is a deficient number, since it is larger than the sum of its proper divisors (6063956927).

16320320065 is a wasteful number, since it uses less digits than its factorization.

16320320065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44256.

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 16320320065 in words is "sixteen billion, three hundred twenty million, three hundred twenty thousand, sixty-five".