40016569 has 2 divisors, whose sum is σ = 40016570. Its totient is φ = 40016568.

The previous prime is 40016563. The next prime is 40016591. The reversal of 40016569 is 96561004.

40016569 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28217344 + 11799225 = 5312^2 + 3435^2 .

It is a cyclic number.

It is not a de Polignac number, because 40016569 - 2⁷ = 40016441 is a prime.

It is a super-2 number, since 2×40016569² = 3202651589063522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40016569.

It is not a weakly prime, because it can be changed into another prime (40016563) 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 as a sum of consecutive naturals, namely, 20008284 + 20008285.

It is an arithmetic number, because the mean of its divisors is an integer number (20008285).

Almost surely, 2^40016569 is an apocalyptic number.

It is an amenable number.

40016569 is a deficient number, since it is larger than the sum of its proper divisors (1).

40016569 is an equidigital number, since it uses as much as digits as its factorization.

40016569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 40016569 is about 6325.8650791809. The cubic root of 40016569 is about 342.0424038026.

The spelling of 40016569 in words is "forty million, sixteen thousand, five hundred sixty-nine".