63718865 has 24 divisors (see below), whose sum is σ = 89357760. Its totient is φ = 43491168.

The previous prime is 63718861. The next prime is 63718867. The reversal of 63718865 is 56881736.

63718865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63718865 - 2² = 63718861 is a prime.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63718861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 68876 + ... + 69794.

It is an arithmetic number, because the mean of its divisors is an integer number (3723240).

Almost surely, 2^63718865 is an apocalyptic number.

It is an amenable number.

63718865 is a deficient number, since it is larger than the sum of its proper divisors (25638895).

63718865 is a wasteful number, since it uses less digits than its factorization.

63718865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1214 counting only the distinct ones).

The product of its digits is 241920, while the sum is 44.

The square root of 63718865 is about 7982.4097238866. The cubic root of 63718865 is about 399.4134423792.

The spelling of 63718865 in words is "sixty-three million, seven hundred eighteen thousand, eight hundred sixty-five".