110561500561 has 2 divisors, whose sum is σ = 110561500562. Its totient is φ = 110561500560.

The previous prime is 110561500513. The next prime is 110561500613. The reversal of 110561500561 is 165005165011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100255190161 + 10306310400 = 316631^2 + 101520^2 .

It is a cyclic number.

It is not a de Polignac number, because 110561500561 - 2⁷ = 110561500433 is a prime.

It is not a weakly prime, because it can be changed into another prime (110561500501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55280750280 + 55280750281.

It is an arithmetic number, because the mean of its divisors is an integer number (55280750281).

Almost surely, 2^110561500561 is an apocalyptic number.

It is an amenable number.

110561500561 is a deficient number, since it is larger than the sum of its proper divisors (1).

110561500561 is an equidigital number, since it uses as much as digits as its factorization.

110561500561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 110561500561 its reverse (165005165011), we get a palindrome (275566665572).

The spelling of 110561500561 in words is "one hundred ten billion, five hundred sixty-one million, five hundred thousand, five hundred sixty-one".