255355434002173 has 2 divisors, whose sum is σ = 255355434002174. Its totient is φ = 255355434002172.

The previous prime is 255355434002117. The next prime is 255355434002189. The reversal of 255355434002173 is 371200434553552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160037351444569 + 95318082557604 = 12650587^2 + 9763098^2 .

It is a cyclic number.

It is not a de Polignac number, because 255355434002173 - 2⁴¹ = 253156410746621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255355434002573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127677717001086 + 127677717001087.

It is an arithmetic number, because the mean of its divisors is an integer number (127677717001087).

Almost surely, 2^{255355434002173} is an apocalyptic number.

It is an amenable number.

255355434002173 is a deficient number, since it is larger than the sum of its proper divisors (1).

255355434002173 is an equidigital number, since it uses as much as digits as its factorization.

255355434002173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560000, while the sum is 49.

The spelling of 255355434002173 in words is "two hundred fifty-five trillion, three hundred fifty-five billion, four hundred thirty-four million, two thousand, one hundred seventy-three".