16338561 has 8 divisors (see below), whose sum is σ = 21803424. Its totient is φ = 10883040.

The previous prime is 16338529. The next prime is 16338577. The reversal of 16338561 is 16583361.

16338561 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 16338561 - 2⁵ = 16338529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16338521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5706 + ... + 8076.

It is an arithmetic number, because the mean of its divisors is an integer number (2725428).

Almost surely, 2^16338561 is an apocalyptic number.

It is an amenable number.

16338561 is a deficient number, since it is larger than the sum of its proper divisors (5464863).

16338561 is a wasteful number, since it uses less digits than its factorization.

16338561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4671.

The product of its digits is 12960, while the sum is 33.

The square root of 16338561 is about 4042.0985886047. The cubic root of 16338561 is about 253.7491530139.

The spelling of 16338561 in words is "sixteen million, three hundred thirty-eight thousand, five hundred sixty-one".