63681012605 has 16 divisors (see below), whose sum is σ = 87339915264. Its totient is φ = 43664002560.

The previous prime is 63681012599. The next prime is 63681012607. The reversal of 63681012605 is 50621018636.

It is a de Polignac number, because none of the positive numbers 2^k-63681012605 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63681012607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 541220 + ... + 648290.

It is an arithmetic number, because the mean of its divisors is an integer number (5458744704).

Almost surely, 2^63681012605 is an apocalyptic number.

It is an amenable number.

63681012605 is a deficient number, since it is larger than the sum of its proper divisors (23658902659).

63681012605 is a wasteful number, since it uses less digits than its factorization.

63681012605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124076.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 63681012605 in words is "sixty-three billion, six hundred eighty-one million, twelve thousand, six hundred five".