12631342266 has 48 divisors (see below), whose sum is σ = 27929701800. Its totient is φ = 4124888064.

The previous prime is 12631342151. The next prime is 12631342277. The reversal of 12631342266 is 66224313621.

12631342266 is a `hidden beast` number, since 1 + 26 + 31 + 342 + 266 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 9011515041 + 3619827225 = 94929^2 + 60165^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12631342266.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 138450 + ... + 210786.

Almost surely, 2^12631342266 is an apocalyptic number.

12631342266 is an abundant number, since it is smaller than the sum of its proper divisors (15298359534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12631342266 is a wasteful number, since it uses less digits than its factorization.

12631342266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72543 (or 72540 counting only the distinct ones).

The product of its digits is 62208, while the sum is 36.

Adding to 12631342266 its reverse (66224313621), we get a palindrome (78855655887).

The spelling of 12631342266 in words is "twelve billion, six hundred thirty-one million, three hundred forty-two thousand, two hundred sixty-six".