16851648 has 112 divisors (see below), whose sum is σ = 49743360. Its totient is φ = 4992000.

The previous prime is 16851647. The next prime is 16851649. The reversal of 16851648 is 84615861.

It is an interprime number because it is at equal distance from previous prime (16851647) and next prime (16851649).

It is not an unprimeable number, because it can be changed into a prime (16851647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 166798 + ... + 166898.

Almost surely, 2^16851648 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 16851648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24871680).

16851648 is an abundant number, since it is smaller than the sum of its proper divisors (32891712).

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

16851648 is a wasteful number, since it uses less digits than its factorization.

16851648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 196 counting only the distinct ones).

The product of its digits is 46080, while the sum is 39.

The square root of 16851648 is about 4105.0758823681. The cubic root of 16851648 is about 256.3780222481.

It can be divided in two parts, 1685 and 1648, that added together give a palindrome (3333).

The spelling of 16851648 in words is "sixteen million, eight hundred fifty-one thousand, six hundred forty-eight".