685334297280 has 448 divisors, whose sum is σ = 2318508748800. Its totient is φ = 171144314880.

The previous prime is 685334297279. The next prime is 685334297293. The reversal of 685334297280 is 82792433586.

685334297280 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 685334297280.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 321903256 + ... + 321905384.

Almost surely, 2^685334297280 is an apocalyptic number.

685334297280 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 685334297280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1159254374400).

685334297280 is an abundant number, since it is smaller than the sum of its proper divisors (1633174451520).

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

685334297280 is a wasteful number, since it uses less digits than its factorization.

685334297280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2472 (or 2462 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 57.

The spelling of 685334297280 in words is "six hundred eighty-five billion, three hundred thirty-four million, two hundred ninety-seven thousand, two hundred eighty".