16636413312 has 128 divisors (see below), whose sum is σ = 49414879200. Its totient is φ = 5509969920.

The previous prime is 16636413289. The next prime is 16636413349. The reversal of 16636413312 is 21331463661.

16636413312 is a `hidden beast` number, since 1 + 6 + 6 + 3 + 641 + 3 + 3 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527262 + ... + 557922.

Almost surely, 2^16636413312 is an apocalyptic number.

16636413312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16636413312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24707439600).

16636413312 is an abundant number, since it is smaller than the sum of its proper divisors (32778465888).

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

16636413312 is a wasteful number, since it uses less digits than its factorization.

16636413312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30841 (or 30823 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

Adding to 16636413312 its reverse (21331463661), we get a palindrome (37967876973).

The spelling of 16636413312 in words is "sixteen billion, six hundred thirty-six million, four hundred thirteen thousand, three hundred twelve".