108541445561 has 2 divisors, whose sum is σ = 108541445562. Its totient is φ = 108541445560.

The previous prime is 108541445533. The next prime is 108541445563. The reversal of 108541445561 is 165544145801.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79724346025 + 28817099536 = 282355^2 + 169756^2 .

It is a cyclic number.

It is not a de Polignac number, because 108541445561 - 2¹⁰ = 108541444537 is a prime.

Together with 108541445563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (108541445563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54270722780 + 54270722781.

It is an arithmetic number, because the mean of its divisors is an integer number (54270722781).

Almost surely, 2^108541445561 is an apocalyptic number.

It is an amenable number.

108541445561 is a deficient number, since it is larger than the sum of its proper divisors (1).

108541445561 is an equidigital number, since it uses as much as digits as its factorization.

108541445561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384000, while the sum is 44.

The spelling of 108541445561 in words is "one hundred eight billion, five hundred forty-one million, four hundred forty-five thousand, five hundred sixty-one".