40236665867443 has 2 divisors, whose sum is σ = 40236665867444. Its totient is φ = 40236665867442.

The previous prime is 40236665867329. The next prime is 40236665867459. The reversal of 40236665867443 is 34476856663204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40236665867443 is a prime.

It is not a weakly prime, because it can be changed into another prime (40236665867483) 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, 20118332933721 + 20118332933722.

It is an arithmetic number, because the mean of its divisors is an integer number (20118332933722).

Almost surely, 2^{40236665867443} is an apocalyptic number.

40236665867443 is a deficient number, since it is larger than the sum of its proper divisors (1).

40236665867443 is an equidigital number, since it uses as much as digits as its factorization.

40236665867443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 418037760, while the sum is 64.

The spelling of 40236665867443 in words is "forty trillion, two hundred thirty-six billion, six hundred sixty-five million, eight hundred sixty-seven thousand, four hundred forty-three".