42185787085 has 16 divisors (see below), whose sum is σ = 55173855744. Its totient is φ = 30777244992.

The previous prime is 42185787067. The next prime is 42185787089. The reversal of 42185787085 is 58078758124.

It is not a de Polignac number, because 42185787085 - 2⁷ = 42185786957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42185787089) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3904317 + ... + 3915106.

It is an arithmetic number, because the mean of its divisors is an integer number (3448365984).

Almost surely, 2^42185787085 is an apocalyptic number.

It is an amenable number.

42185787085 is a deficient number, since it is larger than the sum of its proper divisors (12988068659).

42185787085 is a wasteful number, since it uses less digits than its factorization.

42185787085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7819524.

The product of its (nonzero) digits is 5017600, while the sum is 55.

The spelling of 42185787085 in words is "forty-two billion, one hundred eighty-five million, seven hundred eighty-seven thousand, eighty-five".