42388266779 has 2 divisors, whose sum is σ = 42388266780. Its totient is φ = 42388266778.

The previous prime is 42388266763. The next prime is 42388266839. The reversal of 42388266779 is 97766288324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42388266779 - 2⁴ = 42388266763 is a prime.

It is not a weakly prime, because it can be changed into another prime (42388266749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21194133389 + 21194133390.

It is an arithmetic number, because the mean of its divisors is an integer number (21194133390).

Almost surely, 2^42388266779 is an apocalyptic number.

42388266779 is a deficient number, since it is larger than the sum of its proper divisors (1).

42388266779 is an equidigital number, since it uses as much as digits as its factorization.

42388266779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 62.

The spelling of 42388266779 in words is "forty-two billion, three hundred eighty-eight million, two hundred sixty-six thousand, seven hundred seventy-nine".