16616500000 has 168 divisors, whose sum is σ = 41343220800. Its totient is φ = 6573600000.

The previous prime is 16616499961. The next prime is 16616500003. The reversal of 16616500000 is 561661.

It is a super-2 number, since 2×16616500000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (16616500003) 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 27 ways as a sum of consecutive naturals, for example, 83499901 + ... + 83500099.

It is an arithmetic number, because the mean of its divisors is an integer number (246090600).

Almost surely, 2^16616500000 is an apocalyptic number.

16616500000 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 16616500000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20671610400).

16616500000 is an abundant number, since it is smaller than the sum of its proper divisors (24726720800).

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

16616500000 is an frugal number, since it uses more digits than its factorization.

16616500000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The spelling of 16616500000 in words is "sixteen billion, six hundred sixteen million, five hundred thousand".