16478563 has 4 divisors (see below), whose sum is σ = 16583680. Its totient is φ = 16373448.

The previous prime is 16478551. The next prime is 16478569. The reversal of 16478563 is 36587461.

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: 36587461 = 2459 ⋅14879.

It is a cyclic number.

It is not a de Polignac number, because 16478563 - 2¹³ = 16470371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16478569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52323 + ... + 52636.

It is an arithmetic number, because the mean of its divisors is an integer number (4145920).

Almost surely, 2^16478563 is an apocalyptic number.

16478563 is a deficient number, since it is larger than the sum of its proper divisors (105117).

16478563 is a wasteful number, since it uses less digits than its factorization.

16478563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105116.

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

The square root of 16478563 is about 4059.3796324069. The cubic root of 16478563 is about 254.4718686218.

The spelling of 16478563 in words is "sixteen million, four hundred seventy-eight thousand, five hundred sixty-three".