320216665263 has 16 divisors (see below), whose sum is σ = 466093440000. Its totient is φ = 193935812480.

The previous prime is 320216665207. The next prime is 320216665273. The reversal of 320216665263 is 362566612023.

It is a cyclic number.

It is not a de Polignac number, because 320216665263 - 2⁸ = 320216665007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320216665273) 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, 3324138 + ... + 3419111.

It is an arithmetic number, because the mean of its divisors is an integer number (29130840000).

Almost surely, 2^320216665263 is an apocalyptic number.

320216665263 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

320216665263 is a deficient number, since it is larger than the sum of its proper divisors (145876774737).

320216665263 is a wasteful number, since it uses less digits than its factorization.

320216665263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6744702.

The product of its (nonzero) digits is 466560, while the sum is 42.

The spelling of 320216665263 in words is "three hundred twenty billion, two hundred sixteen million, six hundred sixty-five thousand, two hundred sixty-three".