9851663201 has 4 divisors (see below), whose sum is σ = 9851862804. Its totient is φ = 9851463600.

The previous prime is 9851663189. The next prime is 9851663207. The reversal of 9851663201 is 1023661589.

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 768620176 + 9083043025 = 27724^2 + 95305^2 .

It is a cyclic number.

It is not a de Polignac number, because 9851663201 - 2³⁰ = 8777921377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9851663207) 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, 34271 + ... + 144491.

It is an arithmetic number, because the mean of its divisors is an integer number (2462965701).

Almost surely, 2^9851663201 is an apocalyptic number.

It is an amenable number.

9851663201 is a deficient number, since it is larger than the sum of its proper divisors (199603).

9851663201 is a wasteful number, since it uses less digits than its factorization.

9851663201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199602.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 9851663201 is about 99255.5449383056. The cubic root of 9851663201 is about 2143.7288470278.

The spelling of 9851663201 in words is "nine billion, eight hundred fifty-one million, six hundred sixty-three thousand, two hundred one".