405540434443 has 2 divisors, whose sum is σ = 405540434444. Its totient is φ = 405540434442.

The previous prime is 405540434393. The next prime is 405540434521. The reversal of 405540434443 is 344434045504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405540434443 - 2¹³ = 405540426251 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405540434396 and 405540434405.

It is not a weakly prime, because it can be changed into another prime (405540834443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202770217221 + 202770217222.

It is an arithmetic number, because the mean of its divisors is an integer number (202770217222).

Almost surely, 2^405540434443 is an apocalyptic number.

405540434443 is a deficient number, since it is larger than the sum of its proper divisors (1).

405540434443 is an equidigital number, since it uses as much as digits as its factorization.

405540434443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 921600, while the sum is 40.

Adding to 405540434443 its reverse (344434045504), we get a palindrome (749974479947).

The spelling of 405540434443 in words is "four hundred five billion, five hundred forty million, four hundred thirty-four thousand, four hundred forty-three".