42465107809 has 2 divisors, whose sum is σ = 42465107810. Its totient is φ = 42465107808.

The previous prime is 42465107807. The next prime is 42465107843. The reversal of 42465107809 is 90870156424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36836357184 + 5628750625 = 191928^2 + 75025^2 .

It is a cyclic number.

It is not a de Polignac number, because 42465107809 - 2¹ = 42465107807 is a prime.

Together with 42465107807, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (42465107801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21232553904 + 21232553905.

It is an arithmetic number, because the mean of its divisors is an integer number (21232553905).

Almost surely, 2^42465107809 is an apocalyptic number.

It is an amenable number.

42465107809 is a deficient number, since it is larger than the sum of its proper divisors (1).

42465107809 is an equidigital number, since it uses as much as digits as its factorization.

42465107809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 483840, while the sum is 46.

The spelling of 42465107809 in words is "forty-two billion, four hundred sixty-five million, one hundred seven thousand, eight hundred nine".