12664343511 has 24 divisors (see below), whose sum is σ = 19381602240. Its totient is φ = 7941083136.

The previous prime is 12664343509. The next prime is 12664343533. The reversal of 12664343511 is 11534346621.

12664343511 is a `hidden beast` number, since 1 + 2 + 6 + 643 + 4 + 3 + 5 + 1 + 1 = 666.

It is not a de Polignac number, because 12664343511 - 2¹ = 12664343509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12664343561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 216055 + ... + 268343.

It is an arithmetic number, because the mean of its divisors is an integer number (807566760).

Almost surely, 2^12664343511 is an apocalyptic number.

12664343511 is a deficient number, since it is larger than the sum of its proper divisors (6717258729).

12664343511 is a wasteful number, since it uses less digits than its factorization.

12664343511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53895 (or 53892 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The spelling of 12664343511 in words is "twelve billion, six hundred sixty-four million, three hundred forty-three thousand, five hundred eleven".