42400111079 has 2 divisors, whose sum is σ = 42400111080. Its totient is φ = 42400111078.

The previous prime is 42400111069. The next prime is 42400111177. The reversal of 42400111079 is 97011100424.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42400111079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42400111049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21200055539 + 21200055540.

It is an arithmetic number, because the mean of its divisors is an integer number (21200055540).

Almost surely, 2^42400111079 is an apocalyptic number.

42400111079 is a deficient number, since it is larger than the sum of its proper divisors (1).

42400111079 is an equidigital number, since it uses as much as digits as its factorization.

42400111079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 42400111079 in words is "forty-two billion, four hundred million, one hundred eleven thousand, seventy-nine".