12315240409 has 2 divisors, whose sum is σ = 12315240410. Its totient is φ = 12315240408.

The previous prime is 12315240403. The next prime is 12315240449. The reversal of 12315240409 is 90404251321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12314784784 + 455625 = 110972^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 12315240409 - 2¹¹ = 12315238361 is a prime.

It is not a weakly prime, because it can be changed into another prime (12315240403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6157620204 + 6157620205.

It is an arithmetic number, because the mean of its divisors is an integer number (6157620205).

Almost surely, 2^12315240409 is an apocalyptic number.

It is an amenable number.

12315240409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12315240409 is an equidigital number, since it uses as much as digits as its factorization.

12315240409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 12315240409 in words is "twelve billion, three hundred fifteen million, two hundred forty thousand, four hundred nine".