285138622849 has 2 divisors, whose sum is σ = 285138622850. Its totient is φ = 285138622848.

The previous prime is 285138622831. The next prime is 285138622927. The reversal of 285138622849 is 948226831582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 150866212225 + 134272410624 = 388415^2 + 366432^2 .

It is a cyclic number.

It is not a de Polignac number, because 285138622849 - 2²⁹ = 284601751937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 285138622793 and 285138622802.

It is not a weakly prime, because it can be changed into another prime (285138622819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142569311424 + 142569311425.

It is an arithmetic number, because the mean of its divisors is an integer number (142569311425).

Almost surely, 2^285138622849 is an apocalyptic number.

It is an amenable number.

285138622849 is a deficient number, since it is larger than the sum of its proper divisors (1).

285138622849 is an equidigital number, since it uses as much as digits as its factorization.

285138622849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13271040, while the sum is 58.

The spelling of 285138622849 in words is "two hundred eighty-five billion, one hundred thirty-eight million, six hundred twenty-two thousand, eight hundred forty-nine".