12444667877 has 2 divisors, whose sum is σ = 12444667878. Its totient is φ = 12444667876.

The previous prime is 12444667871. The next prime is 12444667951. The reversal of 12444667877 is 77876644421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9831515716 + 2613152161 = 99154^2 + 51119^2 .

It is a cyclic number.

It is not a de Polignac number, because 12444667877 - 2⁶ = 12444667813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12444667871) 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, 6222333938 + 6222333939.

It is an arithmetic number, because the mean of its divisors is an integer number (6222333939).

Almost surely, 2^12444667877 is an apocalyptic number.

It is an amenable number.

12444667877 is a deficient number, since it is larger than the sum of its proper divisors (1).

12444667877 is an equidigital number, since it uses as much as digits as its factorization.

12444667877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12644352, while the sum is 56.

The spelling of 12444667877 in words is "twelve billion, four hundred forty-four million, six hundred sixty-seven thousand, eight hundred seventy-seven".