254561625173 has 2 divisors, whose sum is σ = 254561625174. Its totient is φ = 254561625172.

The previous prime is 254561625121. The next prime is 254561625221. The reversal of 254561625173 is 371526165452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152480097169 + 102081528004 = 390487^2 + 319502^2 .

It is a cyclic number.

It is not a de Polignac number, because 254561625173 - 2¹⁸ = 254561363029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254561625113) 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, 127280812586 + 127280812587.

It is an arithmetic number, because the mean of its divisors is an integer number (127280812587).

Almost surely, 2^254561625173 is an apocalyptic number.

It is an amenable number.

254561625173 is a deficient number, since it is larger than the sum of its proper divisors (1).

254561625173 is an equidigital number, since it uses as much as digits as its factorization.

254561625173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512000, while the sum is 47.

The spelling of 254561625173 in words is "two hundred fifty-four billion, five hundred sixty-one million, six hundred twenty-five thousand, one hundred seventy-three".