12665141864 has 8 divisors (see below), whose sum is σ = 23747141010. Its totient is φ = 6332570928.

The previous prime is 12665141851. The next prime is 12665141887. The reversal of 12665141864 is 46814156621.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 10132032964 + 2533108900 = 100658^2 + 50330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 791571359 + ... + 791571374.

Almost surely, 2^12665141864 is an apocalyptic number.

It is an amenable number.

12665141864 is a deficient number, since it is larger than the sum of its proper divisors (11081999146).

12665141864 is a wasteful number, since it uses less digits than its factorization.

12665141864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583142739 (or 1583142735 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The spelling of 12665141864 in words is "twelve billion, six hundred sixty-five million, one hundred forty-one thousand, eight hundred sixty-four".