12704999811689 has 2 divisors, whose sum is σ = 12704999811690. Its totient is φ = 12704999811688.

The previous prime is 12704999811629. The next prime is 12704999811719. The reversal of 12704999811689 is 98611899940721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12190516386064 + 514483425625 = 3491492^2 + 717275^2 .

It is a cyclic number.

It is not a de Polignac number, because 12704999811689 - 2¹² = 12704999807593 is a prime.

It is a super-2 number, since 2×12704999811689² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12704999811629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6352499905844 + 6352499905845.

It is an arithmetic number, because the mean of its divisors is an integer number (6352499905845).

Almost surely, 2^{12704999811689} is an apocalyptic number.

It is an amenable number.

12704999811689 is a deficient number, since it is larger than the sum of its proper divisors (1).

12704999811689 is an equidigital number, since it uses as much as digits as its factorization.

12704999811689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 141087744, while the sum is 74.

The spelling of 12704999811689 in words is "twelve trillion, seven hundred four billion, nine hundred ninety-nine million, eight hundred eleven thousand, six hundred eighty-nine".