16491648 has 64 divisors (see below), whose sum is σ = 44529120. Its totient is φ = 5406720.

The previous prime is 16491647. The next prime is 16491653. The reversal of 16491648 is 84619461.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (16491647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25408 + ... + 26048.

Almost surely, 2^16491648 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 16491648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22264560).

16491648 is an abundant number, since it is smaller than the sum of its proper divisors (28037472).

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

16491648 is an equidigital number, since it uses as much as digits as its factorization.

16491648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 713 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 16491648 is about 4060.9910120560. The cubic root of 16491648 is about 254.5392062783.

The spelling of 16491648 in words is "sixteen million, four hundred ninety-one thousand, six hundred forty-eight".