16536805 has 4 divisors (see below), whose sum is σ = 19844172. Its totient is φ = 13229440.

The previous prime is 16536787. The next prime is 16536827. The reversal of 16536805 is 50863561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50863561 = 7 ⋅7266223.

It can be written as a sum of positive squares in 2 ways, for example, as 4153444 + 12383361 = 2038^2 + 3519^2 .

It is not a de Polignac number, because 16536805 - 2⁷ = 16536677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1653676 + ... + 1653685.

It is an arithmetic number, because the mean of its divisors is an integer number (4961043).

Almost surely, 2^16536805 is an apocalyptic number.

It is an amenable number.

16536805 is a deficient number, since it is larger than the sum of its proper divisors (3307367).

16536805 is an equidigital number, since it uses as much as digits as its factorization.

16536805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307366.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 16536805 is about 4066.5470610827. The cubic root of 16536805 is about 254.7713187553.

The spelling of 16536805 in words is "sixteen million, five hundred thirty-six thousand, eight hundred five".