16543417044 has 144 divisors (see below), whose sum is σ = 49193597376. Its totient is φ = 4278758400.

The previous prime is 16543417001. The next prime is 16543417049. The reversal of 16543417044 is 44071434561.

It is a junction number, because it is equal to n+sod(n) for n = 16543416993 and 16543417011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16543417049) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1553482 + ... + 1564094.

It is an arithmetic number, because the mean of its divisors is an integer number (341622204).

Almost surely, 2^16543417044 is an apocalyptic number.

16543417044 is a gapful number since it is divisible by the number (14) 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 16543417044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24596798688).

16543417044 is an abundant number, since it is smaller than the sum of its proper divisors (32650180332).

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

16543417044 is a wasteful number, since it uses less digits than its factorization.

16543417044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10886 (or 10877 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The spelling of 16543417044 in words is "sixteen billion, five hundred forty-three million, four hundred seventeen thousand, forty-four".