285618323321 has 2 divisors, whose sum is σ = 285618323322. Its totient is φ = 285618323320.

The previous prime is 285618323317. The next prime is 285618323363. The reversal of 285618323321 is 123323816582.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 255676866025 + 29941457296 = 505645^2 + 173036^2 .

It is a cyclic number.

It is not a de Polignac number, because 285618323321 - 2² = 285618323317 is a prime.

It is not a weakly prime, because it can be changed into another prime (285618323371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142809161660 + 142809161661.

It is an arithmetic number, because the mean of its divisors is an integer number (142809161661).

Almost surely, 2^285618323321 is an apocalyptic number.

It is an amenable number.

285618323321 is a deficient number, since it is larger than the sum of its proper divisors (1).

285618323321 is an equidigital number, since it uses as much as digits as its factorization.

285618323321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 414720, while the sum is 44.

The spelling of 285618323321 in words is "two hundred eighty-five billion, six hundred eighteen million, three hundred twenty-three thousand, three hundred twenty-one".