63645118 has 4 divisors (see below), whose sum is σ = 95467680. Its totient is φ = 31822558.

The previous prime is 63645083. The next prime is 63645121. The reversal of 63645118 is 81154636.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15911278 + ... + 15911281.

It is an arithmetic number, because the mean of its divisors is an integer number (23866920).

Almost surely, 2^63645118 is an apocalyptic number.

63645118 is a deficient number, since it is larger than the sum of its proper divisors (31822562).

63645118 is a wasteful number, since it uses less digits than its factorization.

63645118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31822561.

The product of its digits is 17280, while the sum is 34.

The square root of 63645118 is about 7977.7890420843. The cubic root of 63645118 is about 399.2592917248.

It can be divided in two parts, 636 and 45118, that added together give a palindrome (45754).

The spelling of 63645118 in words is "sixty-three million, six hundred forty-five thousand, one hundred eighteen".