16808769939 has 16 divisors (see below), whose sum is σ = 24280204032. Its totient is φ = 10281915168.

The previous prime is 16808769937. The next prime is 16808769947. The reversal of 16808769939 is 93996780861.

It is not a de Polignac number, because 16808769939 - 2¹ = 16808769937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16808769939.

It is not an unprimeable number, because it can be changed into a prime (16808769937) 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, 1283889 + ... + 1296914.

It is an arithmetic number, because the mean of its divisors is an integer number (1517512752).

Almost surely, 2^16808769939 is an apocalyptic number.

16808769939 is a deficient number, since it is larger than the sum of its proper divisors (7471434093).

16808769939 is a wasteful number, since it uses less digits than its factorization.

16808769939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2580986.

The product of its (nonzero) digits is 35271936, while the sum is 66.

The spelling of 16808769939 in words is "sixteen billion, eight hundred eight million, seven hundred sixty-nine thousand, nine hundred thirty-nine".