8681645 has 16 divisors (see below), whose sum is σ = 12607488. Its totient is φ = 5602560.

The previous prime is 8681639. The next prime is 8681663. The reversal of 8681645 is 5461868.

8681645 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8681645 - 2²² = 4487341 is a prime.

It is a super-3 number, since 3×8681645³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8681599 and 8681608.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6701 + ... + 7890.

It is an arithmetic number, because the mean of its divisors is an integer number (787968).

Almost surely, 2^8681645 is an apocalyptic number.

8681645 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

8681645 is a deficient number, since it is larger than the sum of its proper divisors (3925843).

8681645 is a wasteful number, since it uses less digits than its factorization.

8681645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14620.

The product of its digits is 46080, while the sum is 38.

The square root of 8681645 is about 2946.4631339964. The cubic root of 8681645 is about 205.5262702646.

The spelling of 8681645 in words is "eight million, six hundred eighty-one thousand, six hundred forty-five".