685847898889 has 8 divisors (see below), whose sum is σ = 700463813760. Its totient is φ = 671232959376.

The previous prime is 685847898871. The next prime is 685847898949. The reversal of 685847898889 is 988898748586.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 685847898889 - 2²⁷ = 685713681161 is a prime.

It is a super-3 number, since 3×685847898889³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (685847898809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1277562 + ... + 1733164.

It is an arithmetic number, because the mean of its divisors is an integer number (87557976720).

Almost surely, 2^685847898889 is an apocalyptic number.

It is an amenable number.

685847898889 is a deficient number, since it is larger than the sum of its proper divisors (14615914871).

685847898889 is a wasteful number, since it uses less digits than its factorization.

685847898889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 487679.

The product of its digits is 17836277760, while the sum is 88.

The spelling of 685847898889 in words is "six hundred eighty-five billion, eight hundred forty-seven million, eight hundred ninety-eight thousand, eight hundred eighty-nine".