685298587466880 has 768 divisors, whose sum is σ = 2554862569459200. Its totient is φ = 175320661082112.

The previous prime is 685298587466873. The next prime is 685298587466897. The reversal of 685298587466880 is 88664785892586.

685298587466880 is a `hidden beast` number, since 6 + 8 + 5 + 2 + 98 + 58 + 7 + 466 + 8 + 8 + 0 = 666.

685298587466880 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (90).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 707598649 + ... + 708566471.

It is an arithmetic number, because the mean of its divisors is an integer number (3326643970650).

Almost surely, 2^{685298587466880} is an apocalyptic number.

685298587466880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685298587466880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1277431284729600).

685298587466880 is an abundant number, since it is smaller than the sum of its proper divisors (1869563981992320).

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

685298587466880 is a wasteful number, since it uses less digits than its factorization.

685298587466880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968043 (or 968019 counting only the distinct ones).

The product of its (nonzero) digits is 89181388800, while the sum is 90.

The spelling of 685298587466880 in words is "six hundred eighty-five trillion, two hundred ninety-eight billion, five hundred eighty-seven million, four hundred sixty-six thousand, eight hundred eighty".