423555565 has 8 divisors (see below), whose sum is σ = 509902848. Its totient is φ = 337753680.

The previous prime is 423555551. The next prime is 423555607. The reversal of 423555565 is 565555324.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 423555565 - 2⁵ = 423555533 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 (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134637 + ... + 137746.

It is an arithmetic number, because the mean of its divisors is an integer number (63737856).

Almost surely, 2^423555565 is an apocalyptic number.

It is an amenable number.

423555565 is a deficient number, since it is larger than the sum of its proper divisors (86347283).

423555565 is a wasteful number, since it uses less digits than its factorization.

423555565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272699.

The product of its digits is 450000, while the sum is 40.

The square root of 423555565 is about 20580.4656166958. The cubic root of 423555565 is about 750.9945708924.

The spelling of 423555565 in words is "four hundred twenty-three million, five hundred fifty-five thousand, five hundred sixty-five".