63806686835 has 16 divisors (see below), whose sum is σ = 76991494944. Its totient is φ = 50763220992.

The previous prime is 63806686817. The next prime is 63806686841. The reversal of 63806686835 is 53868660836.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 63806686835 - 2¹² = 63806682739 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3245144 + ... + 3264746.

It is an arithmetic number, because the mean of its divisors is an integer number (4811968434).

Almost surely, 2^63806686835 is an apocalyptic number.

63806686835 is a deficient number, since it is larger than the sum of its proper divisors (13184808109).

63806686835 is a wasteful number, since it uses less digits than its factorization.

63806686835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23174.

The product of its (nonzero) digits is 29859840, while the sum is 59.

The spelling of 63806686835 in words is "sixty-three billion, eight hundred six million, six hundred eighty-six thousand, eight hundred thirty-five".