40395522665 has 4 divisors (see below), whose sum is σ = 48474627204. Its totient is φ = 32316418128.

The previous prime is 40395522617. The next prime is 40395522667. The reversal of 40395522665 is 56622559304.

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 9293731216 + 31101791449 = 96404^2 + 176357^2 .

It is a cyclic number.

It is not a de Polignac number, because 40395522665 - 2²⁰ = 40394474089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40395522667) 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 3 ways as a sum of consecutive naturals, for example, 4039552262 + ... + 4039552271.

It is an arithmetic number, because the mean of its divisors is an integer number (12118656801).

Almost surely, 2^40395522665 is an apocalyptic number.

It is an amenable number.

40395522665 is a deficient number, since it is larger than the sum of its proper divisors (8079104539).

40395522665 is an equidigital number, since it uses as much as digits as its factorization.

40395522665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8079104538.

The product of its (nonzero) digits is 1944000, while the sum is 47.

The spelling of 40395522665 in words is "forty billion, three hundred ninety-five million, five hundred twenty-two thousand, six hundred sixty-five".