12344666381 has 2 divisors, whose sum is σ = 12344666382. Its totient is φ = 12344666380.

The previous prime is 12344666239. The next prime is 12344666401. The reversal of 12344666381 is 18366644321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11597136100 + 747530281 = 107690^2 + 27341^2 .

It is a cyclic number.

It is not a de Polignac number, because 12344666381 - 2²⁶ = 12277557517 is a prime.

It is a super-2 number, since 2×12344666381² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12344656381) 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, 6172333190 + 6172333191.

It is an arithmetic number, because the mean of its divisors is an integer number (6172333191).

Almost surely, 2^12344666381 is an apocalyptic number.

It is an amenable number.

12344666381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12344666381 is an equidigital number, since it uses as much as digits as its factorization.

12344666381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 497664, while the sum is 44.

The spelling of 12344666381 in words is "twelve billion, three hundred forty-four million, six hundred sixty-six thousand, three hundred eighty-one".