16635500028 has 144 divisors (see below), whose sum is σ = 49781921280. Its totient is φ = 4582956672.

The previous prime is 16635500017. The next prime is 16635500029. The reversal of 16635500028 is 82000553661.

16635500028 is a `hidden beast` number, since 16 + 635 + 5 + 0 + 0 + 0 + 2 + 8 = 666.

It is a super-2 number, since 2×16635500028² (a number of 21 digits) contains 22 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 16635499965 and 16635500001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16635500029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9521451 + ... + 9523197.

Almost surely, 2^16635500028 is an apocalyptic number.

16635500028 is a gapful number since it is divisible by the number (18) 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 16635500028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24890960640).

16635500028 is an abundant number, since it is smaller than the sum of its proper divisors (33146421252).

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

16635500028 is a wasteful number, since it uses less digits than its factorization.

16635500028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096 (or 3091 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 16635500028 in words is "sixteen billion, six hundred thirty-five million, five hundred thousand, twenty-eight".