40016565585 has 12 divisors (see below), whose sum is σ = 69362047092. Its totient is φ = 21342168288.

The previous prime is 40016565553. The next prime is 40016565599. The reversal of 40016565585 is 58556561004.

40016565585 is a `hidden beast` number, since 4 + 0 + 0 + 1 + 6 + 5 + 65 + 585 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11932503696 + 28084061889 = 109236^2 + 167583^2 .

It is not a de Polignac number, because 40016565585 - 2⁵ = 40016565553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 889257013 = 40016565585 / (4 + 0 + 0 + 1 + 6 + 5 + 6 + 5 + 5 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 40016565585.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444628462 + ... + 444628551.

It is an arithmetic number, because the mean of its divisors is an integer number (5780170591).

Almost surely, 2^40016565585 is an apocalyptic number.

40016565585 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40016565585 is a deficient number, since it is larger than the sum of its proper divisors (29345481507).

40016565585 is a wasteful number, since it uses less digits than its factorization.

40016565585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889257024 (or 889257021 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 45.

The spelling of 40016565585 in words is "forty billion, sixteen million, five hundred sixty-five thousand, five hundred eighty-five".