22615445161 has 2 divisors, whose sum is σ = 22615445162. Its totient is φ = 22615445160.

The previous prime is 22615445141. The next prime is 22615445227. The reversal of 22615445161 is 16154451622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22614445161 + 1000000 = 150381^2 + 1000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22615445161 is a prime.

It is a super-2 number, since 2×22615445161² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22615445161.

It is not a weakly prime, because it can be changed into another prime (22615445141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11307722580 + 11307722581.

It is an arithmetic number, because the mean of its divisors is an integer number (11307722581).

Almost surely, 2^22615445161 is an apocalyptic number.

It is an amenable number.

22615445161 is a deficient number, since it is larger than the sum of its proper divisors (1).

22615445161 is an equidigital number, since it uses as much as digits as its factorization.

22615445161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57600, while the sum is 37.

Adding to 22615445161 its reverse (16154451622), we get a palindrome (38769896783).

The spelling of 22615445161 in words is "twenty-two billion, six hundred fifteen million, four hundred forty-five thousand, one hundred sixty-one".