685488330240 has 480 divisors, whose sum is σ = 2597377194720. Its totient is φ = 153722290176.

The previous prime is 685488330223. The next prime is 685488330257. The reversal of 685488330240 is 42033884586.

It is an interprime number because it is at equal distance from previous prime (685488330223) and next prime (685488330257).

It is a tau number, because it is divible by the number of its divisors (480).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19927776 + ... + 19962144.

It is an arithmetic number, because the mean of its divisors is an integer number (5411202489).

Almost surely, 2^685488330240 is an apocalyptic number.

685488330240 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 685488330240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1298688597360).

685488330240 is an abundant number, since it is smaller than the sum of its proper divisors (1911888864480).

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

685488330240 is a wasteful number, since it uses less digits than its factorization.

685488330240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34462 (or 34439 counting only the distinct ones).

The product of its (nonzero) digits is 4423680, while the sum is 51.

The spelling of 685488330240 in words is "six hundred eighty-five billion, four hundred eighty-eight million, three hundred thirty thousand, two hundred forty".