12309643266 has 16 divisors (see below), whose sum is σ = 24643131744. Its totient is φ = 4099240224.

The previous prime is 12309643261. The next prime is 12309643289. The reversal of 12309643266 is 66234690321.

It is not an unprimeable number, because it can be changed into a prime (12309643261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 986836 + ... + 999231.

It is an arithmetic number, because the mean of its divisors is an integer number (1540195734).

Almost surely, 2^12309643266 is an apocalyptic number.

12309643266 is an abundant number, since it is smaller than the sum of its proper divisors (12333488478).

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

12309643266 is a wasteful number, since it uses less digits than its factorization.

12309643266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987105.

The product of its (nonzero) digits is 279936, while the sum is 42.

The spelling of 12309643266 in words is "twelve billion, three hundred nine million, six hundred forty-three thousand, two hundred sixty-six".