69852904209 has 27 divisors (see below), whose sum is σ = 110918965339. Its totient is φ = 42329807520.

The previous prime is 69852904151. The next prime is 69852904223. The reversal of 69852904209 is 90240925896.

It is a happy number.

The square root of 69852904209 is 264297.

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

69852904209 is a `hidden beast` number, since 6 + 98 + 529 + 0 + 4 + 20 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 45178777809 + 24674126400 = 212553^2 + 157080^2 .

It is not a de Polignac number, because 69852904209 - 2⁹ = 69852903697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (69852904259) 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, 8717797 + ... + 8725805.

Almost surely, 2^69852904209 is an apocalyptic number.

69852904209 is the 264297-th square number.

69852904209 is the 132149-th centered octagonal number.

It is an amenable number.

69852904209 is a deficient number, since it is larger than the sum of its proper divisors (41066061130).

69852904209 is an frugal number, since it uses more digits than its factorization.

69852904209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16046 (or 8023 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 69852904209 in words is "sixty-nine billion, eight hundred fifty-two million, nine hundred four thousand, two hundred nine".