9961568227 has 4 divisors (see below), whose sum is σ = 10727842720. Its totient is φ = 9195293736.

The previous prime is 9961568207. The next prime is 9961568233. The reversal of 9961568227 is 7228651699.

9961568227 is digitally balanced in base 3, 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 is a cyclic number.

It is not a de Polignac number, because 9961568227 - 2¹⁵ = 9961535459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9961568207) 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, 383137227 + ... + 383137252.

It is an arithmetic number, because the mean of its divisors is an integer number (2681960680).

Almost surely, 2^9961568227 is an apocalyptic number.

9961568227 is a deficient number, since it is larger than the sum of its proper divisors (766274493).

9961568227 is a wasteful number, since it uses less digits than its factorization.

9961568227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766274492.

The product of its digits is 3265920, while the sum is 55.

The square root of 9961568227 is about 99807.6561542250. The cubic root of 9961568227 is about 2151.6711886289.

The spelling of 9961568227 in words is "nine billion, nine hundred sixty-one million, five hundred sixty-eight thousand, two hundred twenty-seven".