16523442128 has 80 divisors (see below), whose sum is σ = 35105628096. Its totient is φ = 7502960640.

The previous prime is 16523442097. The next prime is 16523442139. The reversal of 16523442128 is 82124432561.

It is a junction number, because it is equal to n+sod(n) for n = 16523442091 and 16523442100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 962258 + ... + 979278.

Almost surely, 2^16523442128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16523442128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17552814048).

16523442128 is an abundant number, since it is smaller than the sum of its proper divisors (18582185968).

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

16523442128 is a wasteful number, since it uses less digits than its factorization.

16523442128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17172 (or 17166 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

Adding to 16523442128 its reverse (82124432561), we get a palindrome (98647874689).

The spelling of 16523442128 in words is "sixteen billion, five hundred twenty-three million, four hundred forty-two thousand, one hundred twenty-eight".