12440455409 has 16 divisors (see below), whose sum is σ = 13558536000. Its totient is φ = 11369413440.

The previous prime is 12440455399. The next prime is 12440455411. The reversal of 12440455409 is 90455404421.

It is a cyclic number.

It is not a de Polignac number, because 12440455409 - 2¹⁶ = 12440389873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12440455439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667994 + ... + 686364.

It is an arithmetic number, because the mean of its divisors is an integer number (847408500).

Almost surely, 2^12440455409 is an apocalyptic number.

12440455409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12440455409 is a deficient number, since it is larger than the sum of its proper divisors (1118080591).

12440455409 is a wasteful number, since it uses less digits than its factorization.

12440455409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19648.

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 12440455409 in words is "twelve billion, four hundred forty million, four hundred fifty-five thousand, four hundred nine".