12003640409 has 2 divisors, whose sum is σ = 12003640410. Its totient is φ = 12003640408.

The previous prime is 12003640403. The next prime is 12003640459. The reversal of 12003640409 is 90404630021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11551950400 + 451690009 = 107480^2 + 21253^2 .

It is a cyclic number.

It is not a de Polignac number, because 12003640409 - 2²⁸ = 11735204953 is a prime.

It is not a weakly prime, because it can be changed into another prime (12003640403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6001820204 + 6001820205.

It is an arithmetic number, because the mean of its divisors is an integer number (6001820205).

Almost surely, 2^12003640409 is an apocalyptic number.

It is an amenable number.

12003640409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12003640409 is an equidigital number, since it uses as much as digits as its factorization.

12003640409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 29.

The spelling of 12003640409 in words is "twelve billion, three million, six hundred forty thousand, four hundred nine".