852885831421809 has 24 divisors (see below), whose sum is σ = 1234212186527112. Its totient is φ = 567544923832320.

The previous prime is 852885831421781. The next prime is 852885831421837. The reversal of 852885831421809 is 908124138588258.

852885831421809 is a `hidden beast` number, since 8 + 5 + 2 + 8 + 8 + 583 + 14 + 21 + 8 + 0 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (852885831421781) and next prime (852885831421837).

It can be written as a sum of positive squares in 4 ways, for example, as 163489390972209 + 689396440449600 = 12786297^2 + 26256360^2 .

It is not a de Polignac number, because 852885831421809 - 2⁷ = 852885831421681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (852885831421879) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40280089 + ... + 57691049.

It is an arithmetic number, because the mean of its divisors is an integer number (51425507771963).

Almost surely, 2^{852885831421809} is an apocalyptic number.

It is an amenable number.

852885831421809 is a deficient number, since it is larger than the sum of its proper divisors (381326355105303).

852885831421809 is a wasteful number, since it uses less digits than its factorization.

852885831421809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17420977 (or 17420974 counting only the distinct ones).

The product of its (nonzero) digits is 353894400, while the sum is 72.

The spelling of 852885831421809 in words is "eight hundred fifty-two trillion, eight hundred eighty-five billion, eight hundred thirty-one million, four hundred twenty-one thousand, eight hundred nine".