40042443889289 has 2 divisors, whose sum is σ = 40042443889290. Its totient is φ = 40042443889288.

The previous prime is 40042443889271. The next prime is 40042443889303. The reversal of 40042443889289 is 98298834424004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39864916493689 + 177527395600 = 6313867^2 + 421340^2 .

It is a cyclic number.

It is not a de Polignac number, because 40042443889289 - 2²⁴ = 40042427112073 is a prime.

It is not a weakly prime, because it can be changed into another prime (40042473889289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021221944644 + 20021221944645.

It is an arithmetic number, because the mean of its divisors is an integer number (20021221944645).

Almost surely, 2^{40042443889289} is an apocalyptic number.

It is an amenable number.

40042443889289 is a deficient number, since it is larger than the sum of its proper divisors (1).

40042443889289 is an equidigital number, since it uses as much as digits as its factorization.

40042443889289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127401984, while the sum is 65.

The spelling of 40042443889289 in words is "forty trillion, forty-two billion, four hundred forty-three million, eight hundred eighty-nine thousand, two hundred eighty-nine".