63642818 has 16 divisors (see below), whose sum is σ = 101220000. Its totient is φ = 29927232.

The previous prime is 63642779. The next prime is 63642833. The reversal of 63642818 is 81824636.

It is a happy number.

63642818 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×63642818³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 743 + ... + 11306.

It is an arithmetic number, because the mean of its divisors is an integer number (6326250).

Almost surely, 2^63642818 is an apocalyptic number.

63642818 is a deficient number, since it is larger than the sum of its proper divisors (37577182).

63642818 is a wasteful number, since it uses less digits than its factorization.

63642818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12209.

The product of its digits is 55296, while the sum is 38.

The square root of 63642818 is about 7977.6448905676. The cubic root of 63642818 is about 399.2544822046.

The spelling of 63642818 in words is "sixty-three million, six hundred forty-two thousand, eight hundred eighteen".