16544001 has 4 divisors (see below), whose sum is σ = 22058672. Its totient is φ = 11029332.

The previous prime is 16543999. The next prime is 16544023. The reversal of 16544001 is 10044561.

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.

It is not a de Polignac number, because 16544001 - 2¹ = 16543999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16544071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2757331 + ... + 2757336.

It is an arithmetic number, because the mean of its divisors is an integer number (5514668).

Almost surely, 2^16544001 is an apocalyptic number.

It is an amenable number.

16544001 is a deficient number, since it is larger than the sum of its proper divisors (5514671).

16544001 is an equidigital number, since it uses as much as digits as its factorization.

16544001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514670.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 16544001 is about 4067.4317449713. The cubic root of 16544001 is about 254.8082680239.

Adding to 16544001 its reverse (10044561), we get a palindrome (26588562).

The spelling of 16544001 in words is "sixteen million, five hundred forty-four thousand, one".