110538125561 has 2 divisors, whose sum is σ = 110538125562. Its totient is φ = 110538125560.

The previous prime is 110538125521. The next prime is 110538125591. The reversal of 110538125561 is 165521835011.

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., 87912250000 + 22625875561 = 296500^2 + 150419^2 .

It is a cyclic number.

It is not a de Polignac number, because 110538125561 - 2²² = 110533931257 is a prime.

It is not a weakly prime, because it can be changed into another prime (110538125521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55269062780 + 55269062781.

It is an arithmetic number, because the mean of its divisors is an integer number (55269062781).

Almost surely, 2^110538125561 is an apocalyptic number.

It is an amenable number.

110538125561 is a deficient number, since it is larger than the sum of its proper divisors (1).

110538125561 is an equidigital number, since it uses as much as digits as its factorization.

110538125561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36000, while the sum is 38.

The spelling of 110538125561 in words is "one hundred ten billion, five hundred thirty-eight million, one hundred twenty-five thousand, five hundred sixty-one".