12394440266 has 8 divisors (see below), whose sum is σ = 20021788164. Its totient is φ = 5720510880.

The previous prime is 12394440263. The next prime is 12394440277. The reversal of 12394440266 is 66204449321.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12353211025 + 41229241 = 111145^2 + 6421^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12394440263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238354595 + ... + 238354646.

Almost surely, 2^12394440266 is an apocalyptic number.

12394440266 is a deficient number, since it is larger than the sum of its proper divisors (7627347898).

12394440266 is a wasteful number, since it uses less digits than its factorization.

12394440266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476709256.

The product of its (nonzero) digits is 248832, while the sum is 41.

Adding to 12394440266 its reverse (66204449321), we get a palindrome (78598889587).

The spelling of 12394440266 in words is "twelve billion, three hundred ninety-four million, four hundred forty thousand, two hundred sixty-six".