16543204500 has 192 divisors, whose sum is σ = 49425981696. Its totient is φ = 4298342400.

The previous prime is 16543204463. The next prime is 16543204501. The reversal of 16543204500 is 540234561.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16543204501) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 9747652 + ... + 9749348.

It is an arithmetic number, because the mean of its divisors is an integer number (257426988).

Almost surely, 2^16543204500 is an apocalyptic number.

16543204500 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 16543204500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24712990848).

16543204500 is an abundant number, since it is smaller than the sum of its proper divisors (32882777196).

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

16543204500 is a wasteful number, since it uses less digits than its factorization.

16543204500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1883 (or 1871 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 16543204500 in words is "sixteen billion, five hundred forty-three million, two hundred four thousand, five hundred".