285375578409 has 40 divisors (see below), whose sum is σ = 428677523208. Its totient is φ = 189191116800.

The previous prime is 285375578357. The next prime is 285375578417. The reversal of 285375578409 is 904875573582.

285375578409 is a `hidden beast` number, since 2 + 8 + 5 + 37 + 557 + 8 + 40 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 262172672784 + 23202905625 = 512028^2 + 152325^2 .

It is not a de Polignac number, because 285375578409 - 2¹³ = 285375570217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (285375578419) 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 in 39 ways as a sum of consecutive naturals, for example, 50054259 + ... + 50059959.

Almost surely, 2^285375578409 is an apocalyptic number.

It is an amenable number.

285375578409 is a deficient number, since it is larger than the sum of its proper divisors (143301944799).

285375578409 is a wasteful number, since it uses less digits than its factorization.

285375578409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9047 (or 9038 counting only the distinct ones).

The product of its (nonzero) digits is 84672000, while the sum is 63.

The spelling of 285375578409 in words is "two hundred eighty-five billion, three hundred seventy-five million, five hundred seventy-eight thousand, four hundred nine".