12271638866 has 8 divisors (see below), whose sum is σ = 18659615484. Its totient is φ = 6051767040.

The previous prime is 12271638859. The next prime is 12271638871. The reversal of 12271638866 is 66883617221.

It can be written as a sum of positive squares in 2 ways, for example, as 12237005641 + 34633225 = 110621^2 + 5885^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42026015 + ... + 42026306.

Almost surely, 2^12271638866 is an apocalyptic number.

12271638866 is a deficient number, since it is larger than the sum of its proper divisors (6387976618).

12271638866 is an equidigital number, since it uses as much as digits as its factorization.

12271638866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84052396.

The product of its digits is 1161216, while the sum is 50.

The spelling of 12271638866 in words is "twelve billion, two hundred seventy-one million, six hundred thirty-eight thousand, eight hundred sixty-six".