40534452865 has 4 divisors (see below), whose sum is σ = 48641343444. Its totient is φ = 32427562288.

The previous prime is 40534452863. The next prime is 40534452887. The reversal of 40534452865 is 56825443504.

It is a happy number.

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 19546556481 + 20987896384 = 139809^2 + 144872^2 .

It is a cyclic number.

It is not a de Polignac number, because 40534452865 - 2¹ = 40534452863 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40534452863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4053445282 + ... + 4053445291.

It is an arithmetic number, because the mean of its divisors is an integer number (12160335861).

Almost surely, 2^40534452865 is an apocalyptic number.

It is an amenable number.

40534452865 is a deficient number, since it is larger than the sum of its proper divisors (8106890579).

40534452865 is an equidigital number, since it uses as much as digits as its factorization.

40534452865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8106890578.

The product of its (nonzero) digits is 2304000, while the sum is 46.

The spelling of 40534452865 in words is "forty billion, five hundred thirty-four million, four hundred fifty-two thousand, eight hundred sixty-five".