9663994603201 has 4 divisors (see below), whose sum is σ = 9691685132500. Its totient is φ = 9636304073904.

The previous prime is 9663994603147. The next prime is 9663994603217. The reversal of 9663994603201 is 1023064993669.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6184273712400 + 3479720890801 = 2486820^2 + 1865401^2 .

It is a cyclic number.

It is not a de Polignac number, because 9663994603201 - 2²⁹ = 9663457732289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9663994609201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13845264126 + ... + 13845264823.

It is an arithmetic number, because the mean of its divisors is an integer number (2422921283125).

Almost surely, 2^{9663994603201} is an apocalyptic number.

It is an amenable number.

9663994603201 is a deficient number, since it is larger than the sum of its proper divisors (27690529299).

9663994603201 is a wasteful number, since it uses less digits than its factorization.

9663994603201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27690529298.

The product of its (nonzero) digits is 11337408, while the sum is 58.

It can be divided in two parts, 966399 and 4603201, that added together give a square (5569600 = 2360²).

The spelling of 9663994603201 in words is "nine trillion, six hundred sixty-three billion, nine hundred ninety-four million, six hundred three thousand, two hundred one".