63655868 has 6 divisors (see below), whose sum is σ = 111397776. Its totient is φ = 31827932.

The previous prime is 63655861. The next prime is 63655877. The reversal of 63655868 is 86855636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63655861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7956980 + ... + 7956987.

It is an arithmetic number, because the mean of its divisors is an integer number (18566296).

Almost surely, 2^63655868 is an apocalyptic number.

It is an amenable number.

63655868 is a deficient number, since it is larger than the sum of its proper divisors (47741908).

63655868 is a wasteful number, since it uses less digits than its factorization.

63655868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913971 (or 15913969 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 47.

The square root of 63655868 is about 7978.4627592037. The cubic root of 63655868 is about 399.2817694675.

The spelling of 63655868 in words is "sixty-three million, six hundred fifty-five thousand, eight hundred sixty-eight".