63694968218 has 16 divisors (see below), whose sum is σ = 109311254784. Its totient is φ = 27267873360.

The previous prime is 63694968217. The next prime is 63694968221. The reversal of 63694968218 is 81286949636.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63694968217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2484305 + ... + 2509812.

It is an arithmetic number, because the mean of its divisors is an integer number (6831953424).

Almost surely, 2^63694968218 is an apocalyptic number.

63694968218 is a deficient number, since it is larger than the sum of its proper divisors (45616286566).

63694968218 is a wasteful number, since it uses less digits than its factorization.

63694968218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4995037.

The product of its digits is 26873856, while the sum is 62.

The spelling of 63694968218 in words is "sixty-three billion, six hundred ninety-four million, nine hundred sixty-eight thousand, two hundred eighteen".