285526716409 has 27 divisors (see below), whose sum is σ = 324501060933. Its totient is φ = 251036220600.

The previous prime is 285526716367. The next prime is 285526716427. The reversal of 285526716409 is 904617625582.

The square root of 285526716409 is 534347.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 285526716409 - 2¹⁹ = 285526192121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 285526716409.

It is not an unprimeable number, because it can be changed into a prime (285526710409) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 182211544 + ... + 182213110.

Almost surely, 2^285526716409 is an apocalyptic number.

285526716409 is the 534347-th square number.

285526716409 is the 267174-th centered octagonal number.

It is an amenable number.

285526716409 is a deficient number, since it is larger than the sum of its proper divisors (38974344524).

285526716409 is an frugal number, since it uses more digits than its factorization.

285526716409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3218 (or 1609 counting only the distinct ones).

The product of its (nonzero) digits is 7257600, while the sum is 55.

The spelling of 285526716409 in words is "two hundred eighty-five billion, five hundred twenty-six million, seven hundred sixteen thousand, four hundred nine".