42559521727 has 2 divisors, whose sum is σ = 42559521728. Its totient is φ = 42559521726.

The previous prime is 42559521721. The next prime is 42559521737. The reversal of 42559521727 is 72712595524.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42559521727 - 2³⁵ = 8199783359 is a prime.

It is a super-2 number, since 2×42559521727² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42559521721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21279760863 + 21279760864.

It is an arithmetic number, because the mean of its divisors is an integer number (21279760864).

Almost surely, 2^42559521727 is an apocalyptic number.

42559521727 is a deficient number, since it is larger than the sum of its proper divisors (1).

42559521727 is an equidigital number, since it uses as much as digits as its factorization.

42559521727 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1764000, while the sum is 49.

The spelling of 42559521727 in words is "forty-two billion, five hundred fifty-nine million, five hundred twenty-one thousand, seven hundred twenty-seven".