873258561 has 24 divisors (see below), whose sum is σ = 1488075264. Its totient is φ = 482906880.

The previous prime is 873258559. The next prime is 873258593. The reversal of 873258561 is 165852378.

873258561 is a `hidden beast` number, since 8 + 7 + 3 + 2 + 585 + 61 = 666.

It is not a de Polignac number, because 873258561 - 2¹ = 873258559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (873258161) 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 23 ways as a sum of consecutive naturals, for example, 221616 + ... + 225521.

It is an arithmetic number, because the mean of its divisors is an integer number (62003136).

Almost surely, 2^873258561 is an apocalyptic number.

It is an amenable number.

873258561 is a deficient number, since it is larger than the sum of its proper divisors (614816703).

873258561 is a wasteful number, since it uses less digits than its factorization.

873258561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447181 (or 447178 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 873258561 is about 29550.9485634556. The cubic root of 873258561 is about 955.8306455988.

The spelling of 873258561 in words is "eight hundred seventy-three million, two hundred fifty-eight thousand, five hundred sixty-one".