12631312266 has 32 divisors (see below), whose sum is σ = 26782361088. Its totient is φ = 3964489920.

The previous prime is 12631312241. The next prime is 12631312277. The reversal of 12631312266 is 66221313621.

It is a super-2 number, since 2×12631312266² (a number of 21 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 910825 + ... + 924588.

It is an arithmetic number, because the mean of its divisors is an integer number (836948784).

Almost surely, 2^12631312266 is an apocalyptic number.

12631312266 is an abundant number, since it is smaller than the sum of its proper divisors (14151048822).

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

12631312266 is a wasteful number, since it uses less digits than its factorization.

12631312266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835486.

The product of its digits is 15552, while the sum is 33.

Adding to 12631312266 its reverse (66221313621), we get a palindrome (78852625887).

The spelling of 12631312266 in words is "twelve billion, six hundred thirty-one million, three hundred twelve thousand, two hundred sixty-six".