40204445541409 has 2 divisors, whose sum is σ = 40204445541410. Its totient is φ = 40204445541408.

The previous prime is 40204445541401. The next prime is 40204445541427. The reversal of 40204445541409 is 90414554440204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23911395845184 + 16293049696225 = 4889928^2 + 4036465^2 .

It is a cyclic number.

It is not a de Polignac number, because 40204445541409 - 2³ = 40204445541401 is a prime.

It is not a weakly prime, because it can be changed into another prime (40204445541401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20102222770704 + 20102222770705.

It is an arithmetic number, because the mean of its divisors is an integer number (20102222770705).

Almost surely, 2^{40204445541409} is an apocalyptic number.

It is an amenable number.

40204445541409 is a deficient number, since it is larger than the sum of its proper divisors (1).

40204445541409 is an equidigital number, since it uses as much as digits as its factorization.

40204445541409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1843200, while the sum is 46.

The spelling of 40204445541409 in words is "forty trillion, two hundred four billion, four hundred forty-five million, five hundred forty-one thousand, four hundred nine".