222165636611 has 4 divisors (see below), whose sum is σ = 224842331112. Its totient is φ = 219488942112.

The previous prime is 222165636607. The next prime is 222165636647. The reversal of 222165636611 is 116636561222.

It is a happy number.

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 222165636611 - 2² = 222165636607 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222165635611) 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, 1338347126 + ... + 1338347291.

It is an arithmetic number, because the mean of its divisors is an integer number (56210582778).

Almost surely, 2^222165636611 is an apocalyptic number.

222165636611 is a deficient number, since it is larger than the sum of its proper divisors (2676694501).

222165636611 is an equidigital number, since it uses as much as digits as its factorization.

222165636611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2676694500.

The product of its digits is 155520, while the sum is 41.

The spelling of 222165636611 in words is "two hundred twenty-two billion, one hundred sixty-five million, six hundred thirty-six thousand, six hundred eleven".