320240375665 has 16 divisors (see below), whose sum is σ = 440749756800. Its totient is φ = 218811922560.

The previous prime is 320240375621. The next prime is 320240375687. The reversal of 320240375665 is 566573042023.

It is not a de Polignac number, because 320240375665 - 2³³ = 311650441073 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, 16270815 + ... + 16290484.

It is an arithmetic number, because the mean of its divisors is an integer number (27546859800).

Almost surely, 2^320240375665 is an apocalyptic number.

320240375665 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

320240375665 is a deficient number, since it is larger than the sum of its proper divisors (120509381135).

320240375665 is a wasteful number, since it uses less digits than its factorization.

320240375665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32561592.

The product of its (nonzero) digits is 907200, while the sum is 43.

The spelling of 320240375665 in words is "three hundred twenty billion, two hundred forty million, three hundred seventy-five thousand, six hundred sixty-five".