40609442089 has 4 divisors (see below), whose sum is σ = 40650174724. Its totient is φ = 40568709456.

The previous prime is 40609442051. The next prime is 40609442113. The reversal of 40609442089 is 98024490604.

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 26181828864 + 14427613225 = 161808^2 + 120115^2 .

It is a cyclic number.

It is not a de Polignac number, because 40609442089 - 2¹³ = 40609433897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40609442039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20364822 + ... + 20366815.

It is an arithmetic number, because the mean of its divisors is an integer number (10162543681).

Almost surely, 2^40609442089 is an apocalyptic number.

It is an amenable number.

40609442089 is a deficient number, since it is larger than the sum of its proper divisors (40732635).

40609442089 is an equidigital number, since it uses as much as digits as its factorization.

40609442089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40732634.

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 40609442089 in words is "forty billion, six hundred nine million, four hundred forty-two thousand, eighty-nine".