16536984138 has 20 divisors (see below), whose sum is σ = 37055094450. Its totient is φ = 5512327992.

The previous prime is 16536984137. The next prime is 16536984187. The reversal of 16536984138 is 83148963561.

16536984138 is a `hidden beast` number, since 1 + 6 + 536 + 98 + 4 + 13 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10680602409 + 5856381729 = 103347^2 + 76527^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (16536984133) 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 9 ways as a sum of consecutive naturals, for example, 51039913 + ... + 51040236.

Almost surely, 2^16536984138 is an apocalyptic number.

16536984138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

16536984138 is an abundant number, since it is smaller than the sum of its proper divisors (20518110312).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16536984138 is a wasteful number, since it uses less digits than its factorization.

16536984138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102080163 (or 102080154 counting only the distinct ones).

The product of its digits is 3732480, while the sum is 54.

The spelling of 16536984138 in words is "sixteen billion, five hundred thirty-six million, nine hundred eighty-four thousand, one hundred thirty-eight".