42559811111 has 2 divisors, whose sum is σ = 42559811112. Its totient is φ = 42559811110.

The previous prime is 42559811053. The next prime is 42559811131. The reversal of 42559811111 is 11111895524.

42559811111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42559811111 is a prime.

It is a super-2 number, since 2×42559811111² (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 (42559811131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21279905555 + 21279905556.

It is an arithmetic number, because the mean of its divisors is an integer number (21279905556).

Almost surely, 2^42559811111 is an apocalyptic number.

42559811111 is a deficient number, since it is larger than the sum of its proper divisors (1).

42559811111 is an equidigital number, since it uses as much as digits as its factorization.

42559811111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 38.

The spelling of 42559811111 in words is "forty-two billion, five hundred fifty-nine million, eight hundred eleven thousand, one hundred eleven".