6845643 has 54 divisors (see below), whose sum is σ = 12422124. Its totient is φ = 3619728.

The previous prime is 6845633. The next prime is 6845659. The reversal of 6845643 is 3465486.

6845643 is a `hidden beast` number, since 6 + 8 + 4 + 5 + 643 = 666.

6845643 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6845643 - 2¹⁴ = 6829259 is a prime.

Its product of digits (69120) is a multiple of the sum of its prime divisors (72).

6845643 is a modest number, since divided by 5643 gives 684 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 6845598 and 6845607.

It is not an unprimeable number, because it can be changed into a prime (6845633) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 159180 + ... + 159222.

Almost surely, 2^6845643 is an apocalyptic number.

6845643 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

6845643 is a deficient number, since it is larger than the sum of its proper divisors (5576481).

6845643 is a wasteful number, since it uses less digits than its factorization.

6845643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 72 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 6845643 is about 2616.4179711965. The cubic root of 6845643 is about 189.8765865215.

The spelling of 6845643 in words is "six million, eight hundred forty-five thousand, six hundred forty-three".