9641645 has 32 divisors (see below), whose sum is σ = 13534080. Its totient is φ = 6531840.

The previous prime is 9641633. The next prime is 9641647. The reversal of 9641645 is 5461469.

It is not a de Polignac number, because 9641645 - 2¹⁰ = 9640621 is a prime.

It is a super-3 number, since 3×9641645³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9641647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45590 + ... + 45800.

It is an arithmetic number, because the mean of its divisors is an integer number (422940).

Almost surely, 2^9641645 is an apocalyptic number.

9641645 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9641645 is a deficient number, since it is larger than the sum of its proper divisors (3892435).

9641645 is a wasteful number, since it uses less digits than its factorization.

9641645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285.

The product of its digits is 25920, while the sum is 35.

The square root of 9641645 is about 3105.0998373643. The cubic root of 9641645 is about 212.8385928483.

The spelling of 9641645 in words is "nine million, six hundred forty-one thousand, six hundred forty-five".