63686916767 has 4 divisors (see below), whose sum is σ = 64888556760. Its totient is φ = 62485276776.

The previous prime is 63686916743. The next prime is 63686916781. The reversal of 63686916767 is 76761968636.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63686916767 - 2¹² = 63686912671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63686916467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 600819917 + ... + 600820022.

It is an arithmetic number, because the mean of its divisors is an integer number (16222139190).

Almost surely, 2^63686916767 is an apocalyptic number.

63686916767 is a deficient number, since it is larger than the sum of its proper divisors (1201639993).

63686916767 is a wasteful number, since it uses less digits than its factorization.

63686916767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201639992.

The product of its digits is 82301184, while the sum is 65.

The spelling of 63686916767 in words is "sixty-three billion, six hundred eighty-six million, nine hundred sixteen thousand, seven hundred sixty-seven".