285381070129 has 8 divisors (see below), whose sum is σ = 290776628520. Its totient is φ = 279985919616.

The previous prime is 285381070063. The next prime is 285381070147. The reversal of 285381070129 is 921070183582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 198858024225 + 86523045904 = 445935^2 + 294148^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 285381070129 - 2⁷ = 285381070001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285381070159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566027 + ... + 1738735.

It is an arithmetic number, because the mean of its divisors is an integer number (36347078565).

Almost surely, 2^285381070129 is an apocalyptic number.

It is an amenable number.

285381070129 is a deficient number, since it is larger than the sum of its proper divisors (5395558391).

285381070129 is a wasteful number, since it uses less digits than its factorization.

285381070129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203939.

The product of its (nonzero) digits is 241920, while the sum is 46.

The spelling of 285381070129 in words is "two hundred eighty-five billion, three hundred eighty-one million, seventy thousand, one hundred twenty-nine".