16543550550 has 24 divisors (see below), whose sum is σ = 41028005736. Its totient is φ = 4411613440.

The previous prime is 16543550549. The next prime is 16543550563. The reversal of 16543550550 is 5505534561.

It is a junction number, because it is equal to n+sod(n) for n = 16543550499 and 16543550508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55145019 + ... + 55145318.

It is an arithmetic number, because the mean of its divisors is an integer number (1709500239).

Almost surely, 2^16543550550 is an apocalyptic number.

16543550550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16543550550 is an abundant number, since it is smaller than the sum of its proper divisors (24484455186).

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

16543550550 is a wasteful number, since it uses less digits than its factorization.

16543550550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110290352 (or 110290347 counting only the distinct ones).

The product of its (nonzero) digits is 225000, while the sum is 39.

The spelling of 16543550550 in words is "sixteen billion, five hundred forty-three million, five hundred fifty thousand, five hundred fifty".