12381717767 has 2 divisors, whose sum is σ = 12381717768. Its totient is φ = 12381717766.

The previous prime is 12381717739. The next prime is 12381717787. The reversal of 12381717767 is 76771718321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12381717767 - 2²² = 12377523463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12381717787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6190858883 + 6190858884.

It is an arithmetic number, because the mean of its divisors is an integer number (6190858884).

Almost surely, 2^12381717767 is an apocalyptic number.

12381717767 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381717767 is an equidigital number, since it uses as much as digits as its factorization.

12381717767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 691488, while the sum is 50.

The spelling of 12381717767 in words is "twelve billion, three hundred eighty-one million, seven hundred seventeen thousand, seven hundred sixty-seven".