63861418 has 8 divisors (see below), whose sum is σ = 101427012. Its totient is φ = 30052416.

The previous prime is 63861389. The next prime is 63861419. The reversal of 63861418 is 81416836.

It can be written as a sum of positive squares in 2 ways, for example, as 51308569 + 12552849 = 7163^2 + 3543^2 .

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

It is not an unprimeable number, because it can be changed into a prime (63861419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939105 + ... + 939172.

Almost surely, 2^63861418 is an apocalyptic number.

63861418 is a deficient number, since it is larger than the sum of its proper divisors (37565594).

63861418 is a wasteful number, since it uses less digits than its factorization.

63861418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878296.

The product of its digits is 27648, while the sum is 37.

The square root of 63861418 is about 7991.3339312032. Note that the first 3 decimals coincide. The cubic root of 63861418 is about 399.7110788617.

The spelling of 63861418 in words is "sixty-three million, eight hundred sixty-one thousand, four hundred eighteen".