16409563 has 8 divisors (see below), whose sum is σ = 17031600. Its totient is φ = 15791328.

The previous prime is 16409551. The next prime is 16409567. The reversal of 16409563 is 36590461.

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

It is a cyclic number.

It is not a de Polignac number, because 16409563 - 2¹⁷ = 16278491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16409567) 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, 10245 + ... + 11737.

It is an arithmetic number, because the mean of its divisors is an integer number (2128950).

Almost surely, 2^16409563 is an apocalyptic number.

16409563 is a deficient number, since it is larger than the sum of its proper divisors (622037).

16409563 is a wasteful number, since it uses less digits than its factorization.

16409563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 16409563 is about 4050.8718814596. The cubic root of 16409563 is about 254.1161919059.

The spelling of 16409563 in words is "sixteen million, four hundred nine thousand, five hundred sixty-three".