42385732809 has 32 divisors (see below), whose sum is σ = 65766435840. Its totient is φ = 23779474752.

The previous prime is 42385732787. The next prime is 42385732843. The reversal of 42385732809 is 90823758324.

It is not a de Polignac number, because 42385732809 - 2¹³ = 42385724617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42385732849) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 966022 + ... + 1008944.

It is an arithmetic number, because the mean of its divisors is an integer number (2055201120).

Almost surely, 2^42385732809 is an apocalyptic number.

It is an amenable number.

42385732809 is a deficient number, since it is larger than the sum of its proper divisors (23380703031).

42385732809 is a wasteful number, since it uses less digits than its factorization.

42385732809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43789.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 42385732809 in words is "forty-two billion, three hundred eighty-five million, seven hundred thirty-two thousand, eight hundred nine".