285693457009 has 9 divisors (see below), whose sum is σ = 286903853067. Its totient is φ = 284488152744.

The previous prime is 285693457001. The next prime is 285693457013. The reversal of 285693457009 is 900754396582.

The square root of 285693457009 is 534503.

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

It can be written as a sum of positive squares in only one way, i.e., 18797232609 + 266896224400 = 137103^2 + 516620^2 .

It is not a de Polignac number, because 285693457009 - 2³ = 285693457001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (285693457001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 143780314 + ... + 143782300.

Almost surely, 2^285693457009 is an apocalyptic number.

285693457009 is the 534503-rd square number.

285693457009 is the 267252-nd centered octagonal number.

It is an amenable number.

285693457009 is a deficient number, since it is larger than the sum of its proper divisors (1210396058).

285693457009 is an frugal number, since it uses more digits than its factorization.

285693457009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 2256 counting only the distinct ones).

The product of its (nonzero) digits is 16329600, while the sum is 58.

The spelling of 285693457009 in words is "two hundred eighty-five billion, six hundred ninety-three million, four hundred fifty-seven thousand, nine".