42408435787 has 2 divisors, whose sum is σ = 42408435788. Its totient is φ = 42408435786.

The previous prime is 42408435697. The next prime is 42408435809. The reversal of 42408435787 is 78753480424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42408435787 is a prime.

It is not a weakly prime, because it can be changed into another prime (42408435887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21204217893 + 21204217894.

It is an arithmetic number, because the mean of its divisors is an integer number (21204217894).

Almost surely, 2^42408435787 is an apocalyptic number.

42408435787 is a deficient number, since it is larger than the sum of its proper divisors (1).

42408435787 is an equidigital number, since it uses as much as digits as its factorization.

42408435787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6021120, while the sum is 52.

The spelling of 42408435787 in words is "forty-two billion, four hundred eight million, four hundred thirty-five thousand, seven hundred eighty-seven".