1108180861 has 2 divisors, whose sum is σ = 1108180862. Its totient is φ = 1108180860.

The previous prime is 1108180859. The next prime is 1108180867. The reversal of 1108180861 is 1680818011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 644855236 + 463325625 = 25394^2 + 21525^2 .

It is an emirp because it is prime and its reverse (1680818011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1108180861 - 2¹ = 1108180859 is a prime.

Together with 1108180859, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1108180867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 554090430 + 554090431.

It is an arithmetic number, because the mean of its divisors is an integer number (554090431).

Almost surely, 2^1108180861 is an apocalyptic number.

It is an amenable number.

1108180861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1108180861 is an equidigital number, since it uses as much as digits as its factorization.

1108180861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 34.

The square root of 1108180861 is about 33289.3505644072. The cubic root of 1108180861 is about 1034.8328702419.

Adding to 1108180861 its reverse (1680818011), we get a palindrome (2788998872).

The spelling of 1108180861 in words is "one billion, one hundred eight million, one hundred eighty thousand, eight hundred sixty-one".