1305440400009 has 4 divisors (see below), whose sum is σ = 1740587200016. Its totient is φ = 870293600004.

The previous prime is 1305440399969. The next prime is 1305440400013. The reversal of 1305440400009 is 9000040445031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-1305440400009 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1305440400029) 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 in 3 ways as a sum of consecutive naturals, for example, 217573399999 + ... + 217573400004.

It is an arithmetic number, because the mean of its divisors is an integer number (435146800004).

Almost surely, 2^{1305440400009} is an apocalyptic number.

It is an amenable number.

1305440400009 is a deficient number, since it is larger than the sum of its proper divisors (435146800007).

1305440400009 is an equidigital number, since it uses as much as digits as its factorization.

1305440400009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435146800006.

The product of its (nonzero) digits is 8640, while the sum is 30.

The spelling of 1305440400009 in words is "one trillion, three hundred five billion, four hundred forty million, four hundred thousand, nine".