40440413309 has 4 divisors (see below), whose sum is σ = 40488614880. Its totient is φ = 40392211740.

The previous prime is 40440413287. The next prime is 40440413323. The reversal of 40440413309 is 90331404404.

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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40440413309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440413329) 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, 24099527 + ... + 24101204.

It is an arithmetic number, because the mean of its divisors is an integer number (10122153720).

Almost surely, 2^40440413309 is an apocalyptic number.

It is an amenable number.

40440413309 is a deficient number, since it is larger than the sum of its proper divisors (48201571).

40440413309 is an equidigital number, since it uses as much as digits as its factorization.

40440413309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48201570.

The product of its (nonzero) digits is 20736, while the sum is 32.

The spelling of 40440413309 in words is "forty billion, four hundred forty million, four hundred thirteen thousand, three hundred nine".