16566421532100 has 144 divisors (see below), whose sum is σ = 54092742217920. Its totient is φ = 3877615884800.

The previous prime is 16566421532083. The next prime is 16566421532107. The reversal of 16566421532100 is 123512466561.

It is a super-2 number, since 2×16566421532100² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16566421532107) 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, 86458227 + ... + 86649626.

It is an arithmetic number, because the mean of its divisors is an integer number (375644043180).

Almost surely, 2^{16566421532100} is an apocalyptic number.

16566421532100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16566421532100 is an abundant number, since it is smaller than the sum of its proper divisors (37526320685820).

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

16566421532100 is a wasteful number, since it uses less digits than its factorization.

16566421532100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173107910 (or 173107903 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

Adding to 16566421532100 its reverse (123512466561), we get a palindrome (16689933998661).

The spelling of 16566421532100 in words is "sixteen trillion, five hundred sixty-six billion, four hundred twenty-one million, five hundred thirty-two thousand, one hundred".