16539648 has 56 divisors (see below), whose sum is σ = 44168568. Its totient is φ = 5505024.

The previous prime is 16539643. The next prime is 16539673. The reversal of 16539648 is 84693561.

It is a nialpdrome in base 16.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16539641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24240 + ... + 24912.

Almost surely, 2^16539648 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 16539648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22084284).

16539648 is an abundant number, since it is smaller than the sum of its proper divisors (27628920).

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

16539648 is an frugal number, since it uses more digits than its factorization.

16539648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702 (or 678 counting only the distinct ones).

The product of its digits is 155520, while the sum is 42.

The square root of 16539648 is about 4066.8966055212. The cubic root of 16539648 is about 254.7859179752.

It can be divided in two parts, 16 and 539648, that multiplied together give a palindrome (8634368).

The spelling of 16539648 in words is "sixteen million, five hundred thirty-nine thousand, six hundred forty-eight".