16845601 has 4 divisors (see below), whose sum is σ = 16865604. Its totient is φ = 16825600.

The previous prime is 16845581. The next prime is 16845611. The reversal of 16845601 is 10654861.

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 9000000 + 7845601 = 3000^2 + 2801^2 .

It is a cyclic number.

It is not a de Polignac number, because 16845601 - 2¹¹ = 16843553 is a prime.

It is a super-5 number, since 5×16845601⁵ (a number of 37 digits) contains 55555 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16845611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8680 + ... + 10441.

It is an arithmetic number, because the mean of its divisors is an integer number (4216401).

Almost surely, 2^16845601 is an apocalyptic number.

It is an amenable number.

16845601 is a deficient number, since it is larger than the sum of its proper divisors (20003).

16845601 is an equidigital number, since it uses as much as digits as its factorization.

16845601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 16845601 is about 4104.3392890939. The cubic root of 16845601 is about 256.3473525796.

The spelling of 16845601 in words is "sixteen million, eight hundred forty-five thousand, six hundred one".