16386538216 has 24 divisors (see below), whose sum is σ = 30950948070. Its totient is φ = 8133389696.

The previous prime is 16386538213. The next prime is 16386538229. The reversal of 16386538216 is 61283568361.

It can be written as a sum of positive squares in 3 ways, for example, as 15043022500 + 1343515716 = 122650^2 + 36654^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16386538216.

It is not an unprimeable number, because it can be changed into a prime (16386538213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 95586 + ... + 204718.

Almost surely, 2^16386538216 is an apocalyptic number.

It is an amenable number.

16386538216 is a deficient number, since it is larger than the sum of its proper divisors (14564409854).

16386538216 is a wasteful number, since it uses less digits than its factorization.

16386538216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109413 (or 109272 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The spelling of 16386538216 in words is "sixteen billion, three hundred eighty-six million, five hundred thirty-eight thousand, two hundred sixteen".