40404445420243 has 2 divisors, whose sum is σ = 40404445420244. Its totient is φ = 40404445420242.

The previous prime is 40404445420223. The next prime is 40404445420247. The reversal of 40404445420243 is 34202454440404.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40404445420243 - 2³³ = 40395855485651 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40404445420196 and 40404445420205.

It is not a weakly prime, because it can be changed into another prime (40404445420247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20202222710121 + 20202222710122.

It is an arithmetic number, because the mean of its divisors is an integer number (20202222710122).

Almost surely, 2^{40404445420243} is an apocalyptic number.

40404445420243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40404445420243 is an equidigital number, since it uses as much as digits as its factorization.

40404445420243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 983040, while the sum is 40.

Adding to 40404445420243 its reverse (34202454440404), we get a palindrome (74606899860647).

The spelling of 40404445420243 in words is "forty trillion, four hundred four billion, four hundred forty-five million, four hundred twenty thousand, two hundred forty-three".