12820725135389 has 2 divisors, whose sum is σ = 12820725135390. Its totient is φ = 12820725135388.

The previous prime is 12820725135233. The next prime is 12820725135403. The reversal of 12820725135389 is 98353152702821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7043408139364 + 5777316996025 = 2653942^2 + 2403605^2 .

It is a cyclic number.

It is not a de Polignac number, because 12820725135389 - 2²⁰ = 12820724086813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12820721135389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6410362567694 + 6410362567695.

It is an arithmetic number, because the mean of its divisors is an integer number (6410362567695).

Almost surely, 2^{12820725135389} is an apocalyptic number.

It is an amenable number.

12820725135389 is a deficient number, since it is larger than the sum of its proper divisors (1).

12820725135389 is an equidigital number, since it uses as much as digits as its factorization.

12820725135389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7257600, while the sum is 56.

The spelling of 12820725135389 in words is "twelve trillion, eight hundred twenty billion, seven hundred twenty-five million, one hundred thirty-five thousand, three hundred eighty-nine".