16320545 has 4 divisors (see below), whose sum is σ = 19584660. Its totient is φ = 13056432.

The previous prime is 16320529. The next prime is 16320569. The reversal of 16320545 is 54502361.

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 12475024 + 3845521 = 3532^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 16320545 - 2⁴ = 16320529 is a prime.

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, 1632050 + ... + 1632059.

It is an arithmetic number, because the mean of its divisors is an integer number (4896165).

Almost surely, 2^16320545 is an apocalyptic number.

It is an amenable number.

16320545 is a deficient number, since it is larger than the sum of its proper divisors (3264115).

16320545 is an equidigital number, since it uses as much as digits as its factorization.

16320545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3264114.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 16320545 is about 4039.8694285831. The cubic root of 16320545 is about 253.6558517318.

The spelling of 16320545 in words is "sixteen million, three hundred twenty thousand, five hundred forty-five".