16506545 has 8 divisors (see below), whose sum is σ = 21608640. Its totient is φ = 12004720.

The previous prime is 16506533. The next prime is 16506547. The reversal of 16506545 is 54560561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16506545 - 2⁸ = 16506289 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16506547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150005 + ... + 150114.

It is an arithmetic number, because the mean of its divisors is an integer number (2701080).

Almost surely, 2^16506545 is an apocalyptic number.

It is an amenable number.

16506545 is a deficient number, since it is larger than the sum of its proper divisors (5102095).

16506545 is a wasteful number, since it uses less digits than its factorization.

16506545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300135.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 16506545 is about 4062.8247562503. The cubic root of 16506545 is about 254.6158254532.

The spelling of 16506545 in words is "sixteen million, five hundred six thousand, five hundred forty-five".