63685812 has 12 divisors (see below), whose sum is σ = 148600256. Its totient is φ = 21228600.

The previous prime is 63685763. The next prime is 63685847. The reversal of 63685812 is 21858636.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653564 + ... + 2653587.

Almost surely, 2^63685812 is an apocalyptic number.

It is an amenable number.

63685812 is an abundant number, since it is smaller than the sum of its proper divisors (84914444).

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

63685812 is a wasteful number, since it uses less digits than its factorization.

63685812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307158 (or 5307156 counting only the distinct ones).

The product of its digits is 69120, while the sum is 39.

The square root of 63685812 is about 7980.3390905400. The cubic root of 63685812 is about 399.3443676193.

The spelling of 63685812 in words is "sixty-three million, six hundred eighty-five thousand, eight hundred twelve".