155530122149 has 2 divisors, whose sum is σ = 155530122150. Its totient is φ = 155530122148.

The previous prime is 155530122107. The next prime is 155530122173. The reversal of 155530122149 is 941221035551.

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., 123745650625 + 31784471524 = 351775^2 + 178282^2 .

It is a cyclic number.

It is not a de Polignac number, because 155530122149 - 2¹⁶ = 155530056613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155530422149) 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, 77765061074 + 77765061075.

It is an arithmetic number, because the mean of its divisors is an integer number (77765061075).

Almost surely, 2^155530122149 is an apocalyptic number.

It is an amenable number.

155530122149 is a deficient number, since it is larger than the sum of its proper divisors (1).

155530122149 is an equidigital number, since it uses as much as digits as its factorization.

155530122149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 155530122149 in words is "one hundred fifty-five billion, five hundred thirty million, one hundred twenty-two thousand, one hundred forty-nine".