16845645 has 16 divisors (see below), whose sum is σ = 27031680. Its totient is φ = 8958144.

The previous prime is 16845641. The next prime is 16845649. The reversal of 16845645 is 54654861.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16845641) and next prime (16845649).

It is not a de Polignac number, because 16845645 - 2² = 16845641 is a prime.

It is a super-3 number, since 3×16845645³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16845641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4392 + ... + 7278.

It is an arithmetic number, because the mean of its divisors is an integer number (1689480).

Almost surely, 2^16845645 is an apocalyptic number.

16845645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16845645 is a deficient number, since it is larger than the sum of its proper divisors (10186035).

16845645 is a wasteful number, since it uses less digits than its factorization.

16845645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3284.

The product of its digits is 115200, while the sum is 39.

The square root of 16845645 is about 4104.3446492711. The cubic root of 16845645 is about 256.3475757689.

The spelling of 16845645 in words is "sixteen million, eight hundred forty-five thousand, six hundred forty-five".