6858489856 has 45 divisors (see below), whose sum is σ = 13737794119. Its totient is φ = 3423944704.

The previous prime is 6858489851. The next prime is 6858489863. The reversal of 6858489856 is 6589848586.

The square root of 6858489856 is 82816.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6858489791 and 6858489800.

It is not an unprimeable number, because it can be changed into a prime (6858489851) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 10600125 + ... + 10600771.

Almost surely, 2^6858489856 is an apocalyptic number.

6858489856 is the 82816-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6858489856

6858489856 is an abundant number, since it is smaller than the sum of its proper divisors (6879304263).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6858489856 is an frugal number, since it uses more digits than its factorization.

6858489856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322 (or 649 counting only the distinct ones).

The product of its digits is 132710400, while the sum is 67.

The cubic root of 6858489856 is about 1899.9528941230.

The spelling of 6858489856 in words is "six billion, eight hundred fifty-eight million, four hundred eighty-nine thousand, eight hundred fifty-six".