63618861 has 8 divisors (see below), whose sum is σ = 85069600. Its totient is φ = 42290352.

The previous prime is 63618857. The next prime is 63618881. The reversal of 63618861 is 16881636.

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

It is not a de Polignac number, because 63618861 - 2² = 63618857 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63618881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29335 + ... + 31428.

It is an arithmetic number, because the mean of its divisors is an integer number (10633700).

Almost surely, 2^63618861 is an apocalyptic number.

It is an amenable number.

63618861 is a deficient number, since it is larger than the sum of its proper divisors (21450739).

63618861 is a wasteful number, since it uses less digits than its factorization.

63618861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61115.

The product of its digits is 41472, while the sum is 39.

The square root of 63618861 is about 7976.1432409404. The cubic root of 63618861 is about 399.2043789337.

The spelling of 63618861 in words is "sixty-three million, six hundred eighteen thousand, eight hundred sixty-one".