12380536657 has 2 divisors, whose sum is σ = 12380536658. Its totient is φ = 12380536656.

The previous prime is 12380536639. The next prime is 12380536717. The reversal of 12380536657 is 75663508321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7058688256 + 5321848401 = 84016^2 + 72951^2 .

It is an emirp because it is prime and its reverse (75663508321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12380536657 - 2¹¹ = 12380534609 is a prime.

It is not a weakly prime, because it can be changed into another prime (12380536607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6190268328 + 6190268329.

It is an arithmetic number, because the mean of its divisors is an integer number (6190268329).

Almost surely, 2^12380536657 is an apocalyptic number.

It is an amenable number.

12380536657 is a deficient number, since it is larger than the sum of its proper divisors (1).

12380536657 is an equidigital number, since it uses as much as digits as its factorization.

12380536657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 46.

The spelling of 12380536657 in words is "twelve billion, three hundred eighty million, five hundred thirty-six thousand, six hundred fifty-seven".