40043355073 has 2 divisors, whose sum is σ = 40043355074. Its totient is φ = 40043355072.

The previous prime is 40043355071. The next prime is 40043355137. The reversal of 40043355073 is 37055334004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39159660544 + 883694529 = 197888^2 + 29727^2 .

It is a cyclic number.

It is not a de Polignac number, because 40043355073 - 2¹ = 40043355071 is a prime.

Together with 40043355071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40043355071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021677536 + 20021677537.

It is an arithmetic number, because the mean of its divisors is an integer number (20021677537).

Almost surely, 2^40043355073 is an apocalyptic number.

It is an amenable number.

40043355073 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043355073 is an equidigital number, since it uses as much as digits as its factorization.

40043355073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 34.

Adding to 40043355073 its reverse (37055334004), we get a palindrome (77098689077).

The spelling of 40043355073 in words is "forty billion, forty-three million, three hundred fifty-five thousand, seventy-three".