16540445 has 4 divisors (see below), whose sum is σ = 19848540. Its totient is φ = 13232352.

The previous prime is 16540429. The next prime is 16540457. The reversal of 16540445 is 54404561.

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 8031556 + 8508889 = 2834^2 + 2917^2 .

It is a cyclic number.

It is not a de Polignac number, because 16540445 - 2⁴ = 16540429 is a prime.

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, 1654040 + ... + 1654049.

It is an arithmetic number, because the mean of its divisors is an integer number (4962135).

Almost surely, 2^16540445 is an apocalyptic number.

It is an amenable number.

16540445 is a deficient number, since it is larger than the sum of its proper divisors (3308095).

16540445 is an equidigital number, since it uses as much as digits as its factorization.

16540445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3308094.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 16540445 is about 4066.9945906037. The cubic root of 16540445 is about 254.7900103862.

The spelling of 16540445 in words is "sixteen million, five hundred forty thousand, four hundred forty-five".