804145563 has 24 divisors (see below), whose sum is σ = 1297227568. Its totient is φ = 494856864.

The previous prime is 804145541. The next prime is 804145579. The reversal of 804145563 is 365541408.

It is a happy number.

804145563 is a `hidden beast` number, since 80 + 4 + 14 + 5 + 563 = 666.

It is not a de Polignac number, because 804145563 - 2²¹ = 802048411 is a prime.

It is not an unprimeable number, because it can be changed into a prime (804145063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124120 + ... + 130437.

Almost surely, 2^804145563 is an apocalyptic number.

804145563 is a deficient number, since it is larger than the sum of its proper divisors (493082005).

804145563 is a wasteful number, since it uses less digits than its factorization.

804145563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254585 (or 254573 counting only the distinct ones).

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

The square root of 804145563 is about 28357.4604469441. The cubic root of 804145563 is about 929.9185048256.

The spelling of 804145563 in words is "eight hundred four million, one hundred forty-five thousand, five hundred sixty-three".