42040444163 has 2 divisors, whose sum is σ = 42040444164. Its totient is φ = 42040444162.

The previous prime is 42040444153. The next prime is 42040444231. The reversal of 42040444163 is 36144404024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42040444163 - 2⁶ = 42040444099 is a prime.

It is not a weakly prime, because it can be changed into another prime (42040444153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020222081 + 21020222082.

It is an arithmetic number, because the mean of its divisors is an integer number (21020222082).

Almost surely, 2^42040444163 is an apocalyptic number.

42040444163 is a deficient number, since it is larger than the sum of its proper divisors (1).

42040444163 is an equidigital number, since it uses as much as digits as its factorization.

42040444163 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 42040444163 its reverse (36144404024), we get a palindrome (78184848187).

The spelling of 42040444163 in words is "forty-two billion, forty million, four hundred forty-four thousand, one hundred sixty-three".