11546147209 has 3 divisors (see below), whose sum is σ = 11546254663. Its totient is φ = 11546039756.

The previous prime is 11546147167. The next prime is 11546147219. The reversal of 11546147209 is 90274164511.

It is a happy number.

The square root of 11546147209 is 107453.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 890127225 + 10656019984 = 29835^2 + 103228^2 .

It is not a de Polignac number, because 11546147209 - 2²³ = 11537758601 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11546147219) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 53727 + ... + 161179.

Almost surely, 2^11546147209 is an apocalyptic number.

11546147209 is the 107453-rd square number.

11546147209 is the 53727-th centered octagonal number.

It is an amenable number.

11546147209 is a deficient number, since it is larger than the sum of its proper divisors (107454).

11546147209 is an frugal number, since it uses more digits than its factorization.

11546147209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214906 (or 107453 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The spelling of 11546147209 in words is "eleven billion, five hundred forty-six million, one hundred forty-seven thousand, two hundred nine".