16543550500 has 24 divisors (see below), whose sum is σ = 36131115384. Its totient is φ = 6617420000.

The previous prime is 16543550483. The next prime is 16543550501. The reversal of 16543550500 is 505534561.

It can be written as a sum of positive squares in 4 ways, for example, as 354041856 + 16189508644 = 18816^2 + 127238^2 .

It is not an unprimeable number, because it can be changed into a prime (16543550501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16543051 + ... + 16544050.

It is an arithmetic number, because the mean of its divisors is an integer number (1505463141).

Almost surely, 2^16543550500 is an apocalyptic number.

16543550500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16543550500 is an abundant number, since it is smaller than the sum of its proper divisors (19587564884).

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

16543550500 is a wasteful number, since it uses less digits than its factorization.

16543550500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33087120 (or 33087108 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 34.

The spelling of 16543550500 in words is "sixteen billion, five hundred forty-three million, five hundred fifty thousand, five hundred".