16649316 has 18 divisors (see below), whose sum is σ = 42085862. Its totient is φ = 5549760.

The previous prime is 16649293. The next prime is 16649317. The reversal of 16649316 is 61394661.

16649316 is a `hidden beast` number, since 1 + 6 + 649 + 3 + 1 + 6 = 666.

16649316 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 16646400 + 2916 = 4080^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 462481 = 16649316 / (1 + 6 + 6 + 4 + 9 + 3 + 1 + 6).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16649317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 231205 + ... + 231276.

Almost surely, 2^16649316 is an apocalyptic number.

It is an amenable number.

16649316 is an abundant number, since it is smaller than the sum of its proper divisors (25436546).

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

16649316 is a wasteful number, since it uses less digits than its factorization.

16649316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462491 (or 462486 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 16649316 is about 4080.3573372929. The cubic root of 16649316 is about 255.3478068240.

The spelling of 16649316 in words is "sixteen million, six hundred forty-nine thousand, three hundred sixteen".