16788216865 has 32 divisors (see below), whose sum is σ = 23134705920. Its totient is φ = 11456640000.

The previous prime is 16788216791. The next prime is 16788216871. The reversal of 16788216865 is 56861288761.

It is a de Polignac number, because none of the positive numbers 2^k-16788216865 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7456990 + ... + 7459240.

It is an arithmetic number, because the mean of its divisors is an integer number (722959560).

Almost surely, 2^16788216865 is an apocalyptic number.

It is an amenable number.

16788216865 is a deficient number, since it is larger than the sum of its proper divisors (6346489055).

16788216865 is a wasteful number, since it uses less digits than its factorization.

16788216865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3193.

The product of its digits is 7741440, while the sum is 58.

The spelling of 16788216865 in words is "sixteen billion, seven hundred eighty-eight million, two hundred sixteen thousand, eight hundred sixty-five".