40001304044243 has 2 divisors, whose sum is σ = 40001304044244. Its totient is φ = 40001304044242.

The previous prime is 40001304044131. The next prime is 40001304044311. The reversal of 40001304044243 is 34244040310004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40001304044243 - 2¹⁰ = 40001304043219 is a prime.

It is not a weakly prime, because it can be changed into another prime (40001304944243) 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, 20000652022121 + 20000652022122.

It is an arithmetic number, because the mean of its divisors is an integer number (20000652022122).

Almost surely, 2^{40001304044243} is an apocalyptic number.

40001304044243 is a deficient number, since it is larger than the sum of its proper divisors (1).

40001304044243 is an equidigital number, since it uses as much as digits as its factorization.

40001304044243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 40001304044243 its reverse (34244040310004), we get a palindrome (74245344354247).

The spelling of 40001304044243 in words is "forty trillion, one billion, three hundred four million, forty-four thousand, two hundred forty-three".