40561775585 has 8 divisors (see below), whose sum is σ = 49989647976. Its totient is φ = 31572408960.

The previous prime is 40561775531. The next prime is 40561775591. The reversal of 40561775585 is 58557716504.

It can be written as a sum of positive squares in 4 ways, for example, as 9740110864 + 30821664721 = 98692^2 + 175561^2 .

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

It is not a de Polignac number, because 40561775585 - 2⁶ = 40561775521 is a prime.

It is a Duffinian 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, 109626236 + ... + 109626605.

It is an arithmetic number, because the mean of its divisors is an integer number (6248705997).

Almost surely, 2^40561775585 is an apocalyptic number.

It is an amenable number.

40561775585 is a deficient number, since it is larger than the sum of its proper divisors (9427872391).

40561775585 is a wasteful number, since it uses less digits than its factorization.

40561775585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219252883.

The product of its (nonzero) digits is 5880000, while the sum is 53.

The spelling of 40561775585 in words is "forty billion, five hundred sixty-one million, seven hundred seventy-five thousand, five hundred eighty-five".