9909860801 has 4 divisors (see below), whose sum is σ = 9910064004. Its totient is φ = 9909657600.

The previous prime is 9909860759. The next prime is 9909860803. The reversal of 9909860801 is 1080689099.

9909860801 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 8658116401 + 1251744400 = 93049^2 + 35380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9909860801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9909860801.

It is not an unprimeable number, because it can be changed into a prime (9909860803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20321 + ... + 142241.

It is an arithmetic number, because the mean of its divisors is an integer number (2477516001).

It is a Poulet number, since it divides 2^9909860800-1.

Almost surely, 2^9909860801 is an apocalyptic number.

9909860801 is the 81281-st pentagonal number.

It is an amenable number.

9909860801 is a deficient number, since it is larger than the sum of its proper divisors (203203).

9909860801 is a wasteful number, since it uses less digits than its factorization.

9909860801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203202.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 9909860801 is about 99548.2837672252. The cubic root of 9909860801 is about 2147.9418415297.

The spelling of 9909860801 in words is "nine billion, nine hundred nine million, eight hundred sixty thousand, eight hundred one".