63685318 has 4 divisors (see below), whose sum is σ = 95527980. Its totient is φ = 31842658.

The previous prime is 63685313. The next prime is 63685327. The reversal of 63685318 is 81358636.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×63685318² = 8111639457522248, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63685313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15921328 + ... + 15921331.

It is an arithmetic number, because the mean of its divisors is an integer number (23881995).

Almost surely, 2^63685318 is an apocalyptic number.

63685318 is a deficient number, since it is larger than the sum of its proper divisors (31842662).

63685318 is a wasteful number, since it uses less digits than its factorization.

63685318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31842661.

The product of its digits is 103680, while the sum is 40.

The square root of 63685318 is about 7980.3081394142. The cubic root of 63685318 is about 399.3433350678.

The spelling of 63685318 in words is "sixty-three million, six hundred eighty-five thousand, three hundred eighteen".