12331956409 has 2 divisors, whose sum is σ = 12331956410. Its totient is φ = 12331956408.

The previous prime is 12331956407. The next prime is 12331956421. The reversal of 12331956409 is 90465913321.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6259183225 + 6072773184 = 79115^2 + 77928^2 .

It is a cyclic number.

It is not a de Polignac number, because 12331956409 - 2¹ = 12331956407 is a prime.

Together with 12331956407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12331956407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6165978204 + 6165978205.

It is an arithmetic number, because the mean of its divisors is an integer number (6165978205).

Almost surely, 2^12331956409 is an apocalyptic number.

It is an amenable number.

12331956409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12331956409 is an equidigital number, since it uses as much as digits as its factorization.

12331956409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174960, while the sum is 43.

The spelling of 12331956409 in words is "twelve billion, three hundred thirty-one million, nine hundred fifty-six thousand, four hundred nine".