63818 has 8 divisors (see below), whose sum is σ = 101412. Its totient is φ = 30016.

The previous prime is 63809. The next prime is 63823. The reversal of 63818 is 81836.

It can be written as a sum of positive squares in 2 ways, for example, as 61009 + 2809 = 247^2 + 53^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×63818³ = 779741813338296, which contains 333 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is an unprimeable number.

63818 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905 + ... + 972.

2⁶³⁸¹⁸ is an apocalyptic number.

63818 is a deficient number, since it is larger than the sum of its proper divisors (37594).

63818 is a wasteful number, since it uses less digits than its factorization.

63818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

The product of its digits is 1152, while the sum is 26.

The square root of 63818 is about 252.6222476347. The cubic root of 63818 is about 39.9620473346.

It can be divided in two parts, 638 and 18, that added together give a palindrome (656).

The spelling of 63818 in words is "sixty-three thousand, eight hundred eighteen".