16539365 has 4 divisors (see below), whose sum is σ = 19847244. Its totient is φ = 13231488.

The previous prime is 16539349. The next prime is 16539377. The reversal of 16539365 is 56393561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4268356 + 12271009 = 2066^2 + 3503^2 .

It is a cyclic number.

It is not a de Polignac number, because 16539365 - 2⁴ = 16539349 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, 1653932 + ... + 1653941.

It is an arithmetic number, because the mean of its divisors is an integer number (4961811).

Almost surely, 2^16539365 is an apocalyptic number.

It is an amenable number.

16539365 is a deficient number, since it is larger than the sum of its proper divisors (3307879).

16539365 is an equidigital number, since it uses as much as digits as its factorization.

16539365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3307878.

The product of its digits is 72900, while the sum is 38.

The square root of 16539365 is about 4066.8618122577. The cubic root of 16539365 is about 254.7844648039.

The spelling of 16539365 in words is "sixteen million, five hundred thirty-nine thousand, three hundred sixty-five".