423642150565 has 4 divisors (see below), whose sum is σ = 508370580684. Its totient is φ = 338913720448.

The previous prime is 423642150557. The next prime is 423642150599. The reversal of 423642150565 is 565051246324.

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 100838637601 + 322803512964 = 317551^2 + 568158^2 .

It is a cyclic number.

It is not a de Polignac number, because 423642150565 - 2³ = 423642150557 is a prime.

It is a Duffinian number.

It is a congruent 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, 42364215052 + ... + 42364215061.

It is an arithmetic number, because the mean of its divisors is an integer number (127092645171).

Almost surely, 2^423642150565 is an apocalyptic number.

It is an amenable number.

423642150565 is a deficient number, since it is larger than the sum of its proper divisors (84728430119).

423642150565 is an equidigital number, since it uses as much as digits as its factorization.

423642150565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84728430118.

The product of its (nonzero) digits is 864000, while the sum is 43.

Adding to 423642150565 its reverse (565051246324), we get a palindrome (988693396889).

The spelling of 423642150565 in words is "four hundred twenty-three billion, six hundred forty-two million, one hundred fifty thousand, five hundred sixty-five".