16565550100 has 72 divisors (see below), whose sum is σ = 39309421536. Its totient is φ = 6009360000.

The previous prime is 16565550077. The next prime is 16565550101. The reversal of 16565550100 is 105556561.

16565550100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×16565550100² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16565550101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 445215 + ... + 480985.

It is an arithmetic number, because the mean of its divisors is an integer number (545964188).

Almost surely, 2^16565550100 is an apocalyptic number.

16565550100 is a gapful number since it is divisible by the number (10) 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 16565550100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19654710768).

16565550100 is an abundant number, since it is smaller than the sum of its proper divisors (22743871436).

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

16565550100 is a wasteful number, since it uses less digits than its factorization.

16565550100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36217 (or 36210 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 34.

It can be divided in two parts, 16565 and 550100, that added together give a palindrome (566665).

The spelling of 16565550100 in words is "sixteen billion, five hundred sixty-five million, five hundred fifty thousand, one hundred".