804561543 has 12 divisors (see below), whose sum is σ = 1178065200. Its totient is φ = 529026336.

The previous prime is 804561509. The next prime is 804561547. The reversal of 804561543 is 345165408.

It is a happy number.

It is not a de Polignac number, because 804561543 - 2¹² = 804557447 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 804561498 and 804561507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (804561547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 611643 + ... + 612956.

It is an arithmetic number, because the mean of its divisors is an integer number (98172100).

Almost surely, 2^804561543 is an apocalyptic number.

804561543 is a deficient number, since it is larger than the sum of its proper divisors (373503657).

804561543 is a wasteful number, since it uses less digits than its factorization.

804561543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1224678 (or 1224675 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 804561543 is about 28364.7940764603. The cubic root of 804561543 is about 930.0788243976.

The spelling of 804561543 in words is "eight hundred four million, five hundred sixty-one thousand, five hundred forty-three".