12640167593 has 2 divisors, whose sum is σ = 12640167594. Its totient is φ = 12640167592.

The previous prime is 12640167583. The next prime is 12640167619. The reversal of 12640167593 is 39576104621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12226167184 + 414000409 = 110572^2 + 20347^2 .

It is an emirp because it is prime and its reverse (39576104621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12640167593 - 2⁴ = 12640167577 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (12640167583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6320083796 + 6320083797.

It is an arithmetic number, because the mean of its divisors is an integer number (6320083797).

Almost surely, 2^12640167593 is an apocalyptic number.

It is an amenable number.

12640167593 is a deficient number, since it is larger than the sum of its proper divisors (1).

12640167593 is an equidigital number, since it uses as much as digits as its factorization.

12640167593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 272160, while the sum is 44.

The spelling of 12640167593 in words is "twelve billion, six hundred forty million, one hundred sixty-seven thousand, five hundred ninety-three".