155208668171 has 2 divisors, whose sum is σ = 155208668172. Its totient is φ = 155208668170.

The previous prime is 155208668141. The next prime is 155208668177. The reversal of 155208668171 is 171866802551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155208668171 - 2³⁰ = 154134926347 is a prime.

It is not a weakly prime, because it can be changed into another prime (155208668177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77604334085 + 77604334086.

It is an arithmetic number, because the mean of its divisors is an integer number (77604334086).

Almost surely, 2^155208668171 is an apocalyptic number.

155208668171 is a deficient number, since it is larger than the sum of its proper divisors (1).

155208668171 is an equidigital number, since it uses as much as digits as its factorization.

155208668171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 806400, while the sum is 50.

The spelling of 155208668171 in words is "one hundred fifty-five billion, two hundred eight million, six hundred sixty-eight thousand, one hundred seventy-one".