16648537 has 4 divisors (see below), whose sum is σ = 16813476. Its totient is φ = 16483600.

The previous prime is 16648517. The next prime is 16648543. The reversal of 16648537 is 73584661.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73584661 = 101 ⋅728561.

It can be written as a sum of positive squares in 2 ways, for example, as 16475481 + 173056 = 4059^2 + 416^2 .

It is a cyclic number.

It is not a de Polignac number, because 16648537 - 2¹⁹ = 16124249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16648537.

It is not an unprimeable number, because it can be changed into a prime (16648507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82318 + ... + 82519.

It is an arithmetic number, because the mean of its divisors is an integer number (4203369).

Almost surely, 2^16648537 is an apocalyptic number.

It is an amenable number.

16648537 is a deficient number, since it is larger than the sum of its proper divisors (164939).

16648537 is a wasteful number, since it uses less digits than its factorization.

16648537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164938.

The product of its digits is 120960, while the sum is 40.

The square root of 16648537 is about 4080.2618788504. The cubic root of 16648537 is about 255.3438242972.

It can be divided in two parts, 1664 and 8537, that added together give a palindrome (10201).

The spelling of 16648537 in words is "sixteen million, six hundred forty-eight thousand, five hundred thirty-seven".