16648449 has 4 divisors (see below), whose sum is σ = 22197936. Its totient is φ = 11098964.

The previous prime is 16648441. The next prime is 16648469. The reversal of 16648449 is 94484661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94484661 = 3 ⋅31494887.

It is a cyclic number.

It is not a de Polignac number, because 16648449 - 2³ = 16648441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16648449.

It is not an unprimeable number, because it can be changed into a prime (16648441) 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, 2774739 + ... + 2774744.

It is an arithmetic number, because the mean of its divisors is an integer number (5549484).

Almost surely, 2^16648449 is an apocalyptic number.

It is an amenable number.

16648449 is a deficient number, since it is larger than the sum of its proper divisors (5549487).

16648449 is an equidigital number, since it uses as much as digits as its factorization.

16648449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5549486.

The product of its digits is 165888, while the sum is 42.

The square root of 16648449 is about 4080.2510952146. The cubic root of 16648449 is about 255.3433744018.

The spelling of 16648449 in words is "sixteen million, six hundred forty-eight thousand, four hundred forty-nine".