12816064687 has 2 divisors, whose sum is σ = 12816064688. Its totient is φ = 12816064686.

The previous prime is 12816064643. The next prime is 12816064691. The reversal of 12816064687 is 78646061821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12816064687 - 2²⁷ = 12681846959 is a prime.

It is a super-2 number, since 2×12816064687² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12816064687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12816064697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6408032343 + 6408032344.

It is an arithmetic number, because the mean of its divisors is an integer number (6408032344).

Almost surely, 2^12816064687 is an apocalyptic number.

12816064687 is a deficient number, since it is larger than the sum of its proper divisors (1).

12816064687 is an equidigital number, since it uses as much as digits as its factorization.

12816064687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 49.

The spelling of 12816064687 in words is "twelve billion, eight hundred sixteen million, sixty-four thousand, six hundred eighty-seven".