685886496768 has 784 divisors, whose sum is σ = 2297490844176. Its totient is φ = 202887659520.

The previous prime is 685886496733. The next prime is 685886496803. The reversal of 685886496768 is 867694688586.

685886496768 is a `hidden beast` number, since 6 + 8 + 58 + 8 + 6 + 496 + 76 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (685886496733) and next prime (685886496803).

It is a Harshad number since it is a multiple of its sum of digits (81).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 3481657246 + ... + 3481657442.

Almost surely, 2^685886496768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 685886496768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1148745422088).

685886496768 is an abundant number, since it is smaller than the sum of its proper divisors (1611604347408).

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

685886496768 is an equidigital number, since it uses as much as digits as its factorization.

685886496768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 266 counting only the distinct ones).

The product of its digits is 6688604160, while the sum is 81.

The spelling of 685886496768 in words is "six hundred eighty-five billion, eight hundred eighty-six million, four hundred ninety-six thousand, seven hundred sixty-eight".