9781063801663 has 32 divisors (see below), whose sum is σ = 12333006766080. Its totient is φ = 7535516508000.

The previous prime is 9781063801661. The next prime is 9781063801699. The reversal of 9781063801663 is 3661083601879.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 9781063801663 - 2¹ = 9781063801661 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 9781063801598 and 9781063801607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9781063801661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 944518 + ... + 4522636.

It is an arithmetic number, because the mean of its divisors is an integer number (385406461440).

Almost surely, 2^{9781063801663} is an apocalyptic number.

9781063801663 is a deficient number, since it is larger than the sum of its proper divisors (2551942964417).

9781063801663 is a wasteful number, since it uses less digits than its factorization.

9781063801663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578539.

The product of its (nonzero) digits is 7838208, while the sum is 58.

The spelling of 9781063801663 in words is "nine trillion, seven hundred eighty-one billion, sixty-three million, eight hundred one thousand, six hundred sixty-three".