859871845 has 16 divisors (see below), whose sum is σ = 1203321600. Its totient is φ = 589625232.

The previous prime is 859871833. The next prime is 859871867. The reversal of 859871845 is 548178958.

It is not a de Polignac number, because 859871845 - 2⁷ = 859871717 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 248977 + ... + 252406.

It is an arithmetic number, because the mean of its divisors is an integer number (75207600).

Almost surely, 2^859871845 is an apocalyptic number.

It is an amenable number.

859871845 is a deficient number, since it is larger than the sum of its proper divisors (343449755).

859871845 is an equidigital number, since it uses as much as digits as its factorization.

859871845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501409 (or 501395 counting only the distinct ones).

The product of its digits is 3225600, while the sum is 55.

The square root of 859871845 is about 29323.5714912082. The cubic root of 859871845 is about 950.9213019928.

The spelling of 859871845 in words is "eight hundred fifty-nine million, eight hundred seventy-one thousand, eight hundred forty-five".