12804273961 has 2 divisors, whose sum is σ = 12804273962. Its totient is φ = 12804273960.

The previous prime is 12804273953. The next prime is 12804273997. The reversal of 12804273961 is 16937240821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9553107600 + 3251166361 = 97740^2 + 57019^2 .

It is an emirp because it is prime and its reverse (16937240821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12804273961 - 2³ = 12804273953 is a prime.

It is not a weakly prime, because it can be changed into another prime (12804273901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6402136980 + 6402136981.

It is an arithmetic number, because the mean of its divisors is an integer number (6402136981).

Almost surely, 2^12804273961 is an apocalyptic number.

It is an amenable number.

12804273961 is a deficient number, since it is larger than the sum of its proper divisors (1).

12804273961 is an equidigital number, since it uses as much as digits as its factorization.

12804273961 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 12804273961 in words is "twelve billion, eight hundred four million, two hundred seventy-three thousand, nine hundred sixty-one".