40044202409 has 2 divisors, whose sum is σ = 40044202410. Its totient is φ = 40044202408.

The previous prime is 40044202399. The next prime is 40044202439. The reversal of 40044202409 is 90420244004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39742416025 + 301786384 = 199355^2 + 17372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40044202409 is a prime.

It is a super-2 number, since 2×40044202409² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40044202439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20022101204 + 20022101205.

It is an arithmetic number, because the mean of its divisors is an integer number (20022101205).

Almost surely, 2^40044202409 is an apocalyptic number.

It is an amenable number.

40044202409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40044202409 is an equidigital number, since it uses as much as digits as its factorization.

40044202409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 29.

The spelling of 40044202409 in words is "forty billion, forty-four million, two hundred two thousand, four hundred nine".