216316263909 has 4 divisors (see below), whose sum is σ = 288421685216. Its totient is φ = 144210842604.

The previous prime is 216316263893. The next prime is 216316263929. The reversal of 216316263909 is 909362613612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 216316263909 - 2⁴ = 216316263893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216316263929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36052710649 + ... + 36052710654.

It is an arithmetic number, because the mean of its divisors is an integer number (72105421304).

Almost surely, 2^216316263909 is an apocalyptic number.

It is an amenable number.

216316263909 is a deficient number, since it is larger than the sum of its proper divisors (72105421307).

216316263909 is an equidigital number, since it uses as much as digits as its factorization.

216316263909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72105421306.

The product of its (nonzero) digits is 629856, while the sum is 48.

The spelling of 216316263909 in words is "two hundred sixteen billion, three hundred sixteen million, two hundred sixty-three thousand, nine hundred nine".