9986644211 has 4 divisors (see below), whose sum is σ = 10256553552. Its totient is φ = 9716734872.

The previous prime is 9986644193. The next prime is 9986644273. The reversal of 9986644211 is 1124466899.

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

It is not a de Polignac number, because 9986644211 - 2²² = 9982449907 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9986644211.

It is not an unprimeable number, because it can be changed into a prime (9986604211) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134954615 + ... + 134954688.

It is an arithmetic number, because the mean of its divisors is an integer number (2564138388).

Almost surely, 2^9986644211 is an apocalyptic number.

9986644211 is a deficient number, since it is larger than the sum of its proper divisors (269909341).

9986644211 is a wasteful number, since it uses less digits than its factorization.

9986644211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269909340.

The product of its digits is 746496, while the sum is 50.

The square root of 9986644211 is about 99933.1987429603. The cubic root of 9986644211 is about 2153.4751235416.

The spelling of 9986644211 in words is "nine billion, nine hundred eighty-six million, six hundred forty-four thousand, two hundred eleven".