42585084505 has 4 divisors (see below), whose sum is σ = 51102101412. Its totient is φ = 34068067600.

The previous prime is 42585084467. The next prime is 42585084523. The reversal of 42585084505 is 50548058524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13920224256 + 28664860249 = 117984^2 + 169307^2 .

It is a de Polignac number, because none of the positive numbers 2^k-42585084505 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4258508446 + ... + 4258508455.

It is an arithmetic number, because the mean of its divisors is an integer number (12775525353).

Almost surely, 2^42585084505 is an apocalyptic number.

It is an amenable number.

42585084505 is a deficient number, since it is larger than the sum of its proper divisors (8517016907).

42585084505 is an equidigital number, since it uses as much as digits as its factorization.

42585084505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8517016906.

The product of its (nonzero) digits is 1280000, while the sum is 46.

The spelling of 42585084505 in words is "forty-two billion, five hundred eighty-five million, eighty-four thousand, five hundred five".