16539161 has 4 divisors (see below), whose sum is σ = 16738512. Its totient is φ = 16339812.

The previous prime is 16539119. The next prime is 16539163. The reversal of 16539161 is 16193561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16193561 = 163 ⋅99347.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16539161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16539163) 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, 99551 + ... + 99716.

It is an arithmetic number, because the mean of its divisors is an integer number (4184628).

Almost surely, 2^16539161 is an apocalyptic number.

It is an amenable number.

16539161 is a deficient number, since it is larger than the sum of its proper divisors (199351).

16539161 is an equidigital number, since it uses as much as digits as its factorization.

16539161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199350.

The product of its digits is 4860, while the sum is 32.

The square root of 16539161 is about 4066.8367314167. The cubic root of 16539161 is about 254.7834172779.

The spelling of 16539161 in words is "sixteen million, five hundred thirty-nine thousand, one hundred sixty-one".