42540044539 has 2 divisors, whose sum is σ = 42540044540. Its totient is φ = 42540044538.

The previous prime is 42540044483. The next prime is 42540044567. The reversal of 42540044539 is 93544004524.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42540044539 - 2⁷ = 42540044411 is a prime.

It is not a weakly prime, because it can be changed into another prime (42540024539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21270022269 + 21270022270.

It is an arithmetic number, because the mean of its divisors is an integer number (21270022270).

Almost surely, 2^42540044539 is an apocalyptic number.

42540044539 is a deficient number, since it is larger than the sum of its proper divisors (1).

42540044539 is an equidigital number, since it uses as much as digits as its factorization.

42540044539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 42540044539 in words is "forty-two billion, five hundred forty million, forty-four thousand, five hundred thirty-nine".