16209016408500 has 96 divisors (see below), whose sum is σ = 47224066012032. Its totient is φ = 4320260582400.

The previous prime is 16209016408499. The next prime is 16209016408523. The reversal of 16209016408500 is 580461090261.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 346767 + ... + 5704233.

It is an arithmetic number, because the mean of its divisors is an integer number (491917354292).

Almost surely, 2^{16209016408500} is an apocalyptic number.

16209016408500 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 16209016408500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23612033006016).

16209016408500 is an abundant number, since it is smaller than the sum of its proper divisors (31015049603532).

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

16209016408500 is a wasteful number, since it uses less digits than its factorization.

16209016408500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5359506 (or 5359494 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

Adding to 16209016408500 its reverse (580461090261), we get a palindrome (16789477498761).

The spelling of 16209016408500 in words is "sixteen trillion, two hundred nine billion, sixteen million, four hundred eight thousand, five hundred".