12381787357 has 2 divisors, whose sum is σ = 12381787358. Its totient is φ = 12381787356.

The previous prime is 12381787321. The next prime is 12381787459. The reversal of 12381787357 is 75378718321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7219221156 + 5162566201 = 84966^2 + 71851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12381787357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12381787757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6190893678 + 6190893679.

It is an arithmetic number, because the mean of its divisors is an integer number (6190893679).

Almost surely, 2^12381787357 is an apocalyptic number.

It is an amenable number.

12381787357 is a deficient number, since it is larger than the sum of its proper divisors (1).

12381787357 is an equidigital number, since it uses as much as digits as its factorization.

12381787357 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1975680, while the sum is 52.

The spelling of 12381787357 in words is "twelve billion, three hundred eighty-one million, seven hundred eighty-seven thousand, three hundred fifty-seven".