8216735329209 has 16 divisors (see below), whose sum is σ = 11961683838720. Its totient is φ = 4975644254160.

The previous prime is 8216735329207. The next prime is 8216735329259. The reversal of 8216735329209 is 9029235376128.

It is a happy number.

It is not a de Polignac number, because 8216735329209 - 2¹ = 8216735329207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8216735329207) 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, 104843719 + ... + 104922060.

It is an arithmetic number, because the mean of its divisors is an integer number (747605239920).

Almost surely, 2^{8216735329209} is an apocalyptic number.

It is an amenable number.

8216735329209 is a deficient number, since it is larger than the sum of its proper divisors (3744948509511).

8216735329209 is a wasteful number, since it uses less digits than its factorization.

8216735329209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209766980.

The product of its (nonzero) digits is 9797760, while the sum is 57.

The spelling of 8216735329209 in words is "eight trillion, two hundred sixteen billion, seven hundred thirty-five million, three hundred twenty-nine thousand, two hundred nine".