63791616647 has 16 divisors (see below), whose sum is σ = 69869240064. Its totient is φ = 57760752000.

The previous prime is 63791616541. The next prime is 63791616689. The reversal of 63791616647 is 74661619736.

It is a cyclic number.

It is not a de Polignac number, because 63791616647 - 2¹⁸ = 63791354503 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63791616592 and 63791616601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63791616247) 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 15 ways as a sum of consecutive naturals, for example, 3813572 + ... + 3830262.

It is an arithmetic number, because the mean of its divisors is an integer number (4366827504).

Almost surely, 2^63791616647 is an apocalyptic number.

63791616647 is a deficient number, since it is larger than the sum of its proper divisors (6077623417).

63791616647 is a wasteful number, since it uses less digits than its factorization.

63791616647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18070.

The product of its digits is 6858432, while the sum is 56.

The spelling of 63791616647 in words is "sixty-three billion, seven hundred ninety-one million, six hundred sixteen thousand, six hundred forty-seven".