12645687176 has 8 divisors (see below), whose sum is σ = 23710663470. Its totient is φ = 6322843584.

The previous prime is 12645687169. The next prime is 12645687193. The reversal of 12645687176 is 67178654621.

It can be written as a sum of positive squares in only one way, i.e., 11843098276 + 802588900 = 108826^2 + 28330^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 790355441 + ... + 790355456.

Almost surely, 2^12645687176 is an apocalyptic number.

It is an amenable number.

12645687176 is a deficient number, since it is larger than the sum of its proper divisors (11064976294).

12645687176 is a wasteful number, since it uses less digits than its factorization.

12645687176 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580710903 (or 1580710899 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 53.

The spelling of 12645687176 in words is "twelve billion, six hundred forty-five million, six hundred eighty-seven thousand, one hundred seventy-six".