63681545418 has 8 divisors (see below), whose sum is σ = 127363090848. Its totient is φ = 21227181804.

The previous prime is 63681545407. The next prime is 63681545467. The reversal of 63681545418 is 81454518636.

It is a happy number.

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

63681545418 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5306795446 + ... + 5306795457.

It is an arithmetic number, because the mean of its divisors is an integer number (15920386356).

Almost surely, 2^63681545418 is an apocalyptic number.

63681545418 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63681545418 is a wasteful number, since it uses less digits than its factorization.

63681545418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10613590908.

The product of its digits is 2764800, while the sum is 51.

The spelling of 63681545418 in words is "sixty-three billion, six hundred eighty-one million, five hundred forty-five thousand, four hundred eighteen".