685563012 has 72 divisors (see below), whose sum is σ = 1848319200. Its totient is φ = 213504768.

The previous prime is 685562993. The next prime is 685563031. The reversal of 685563012 is 210365586.

685563012 is a `hidden beast` number, since 6 + 8 + 5 + 5 + 630 + 12 = 666.

It is an interprime number because it is at equal distance from previous prime (685562993) and next prime (685563031).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81039 + ... + 89097.

It is an arithmetic number, because the mean of its divisors is an integer number (25671100).

Almost surely, 2^685563012 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 685563012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (924159600).

685563012 is an abundant number, since it is smaller than the sum of its proper divisors (1162756188).

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

685563012 is a wasteful number, since it uses less digits than its factorization.

685563012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8225 (or 8220 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 685563012 is about 26183.2582388060. The cubic root of 685563012 is about 881.7574263117.

The spelling of 685563012 in words is "six hundred eighty-five million, five hundred sixty-three thousand, twelve".