40815609 has 8 divisors (see below), whose sum is σ = 54476352. Its totient is φ = 27182640.

The previous prime is 40815601. The next prime is 40815617. The reversal of 40815609 is 90651804.

It is an interprime number because it is at equal distance from previous prime (40815601) and next prime (40815617).

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

It is not a de Polignac number, because 40815609 - 2³ = 40815601 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40815609.

It is not an unprimeable number, because it can be changed into a prime (40815601) 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 7 ways as a sum of consecutive naturals, for example, 3229 + ... + 9594.

It is an arithmetic number, because the mean of its divisors is an integer number (6809544).

Almost surely, 2^40815609 is an apocalyptic number.

It is an amenable number.

40815609 is a deficient number, since it is larger than the sum of its proper divisors (13660743).

40815609 is a wasteful number, since it uses less digits than its factorization.

40815609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13887.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 40815609 is about 6388.7094940997. The cubic root of 40815609 is about 344.3040201515.

The spelling of 40815609 in words is "forty million, eight hundred fifteen thousand, six hundred nine".