385641815173 has 2 divisors, whose sum is σ = 385641815174. Its totient is φ = 385641815172.

The previous prime is 385641815161. The next prime is 385641815213. The reversal of 385641815173 is 371518146583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220267832929 + 165373982244 = 469327^2 + 406662^2 .

It is a cyclic number.

It is not a de Polignac number, because 385641815173 - 2¹³ = 385641806981 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385641815173.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385641815113) 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, 192820907586 + 192820907587.

It is an arithmetic number, because the mean of its divisors is an integer number (192820907587).

Almost surely, 2^385641815173 is an apocalyptic number.

It is an amenable number.

385641815173 is a deficient number, since it is larger than the sum of its proper divisors (1).

385641815173 is an equidigital number, since it uses as much as digits as its factorization.

385641815173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2419200, while the sum is 52.

The spelling of 385641815173 in words is "three hundred eighty-five billion, six hundred forty-one million, eight hundred fifteen thousand, one hundred seventy-three".