40045565 has 16 divisors (see below), whose sum is σ = 55742592. Its totient is φ = 27048384.

The previous prime is 40045547. The next prime is 40045589. The reversal of 40045565 is 56554004.

It is a cyclic number.

It is not a de Polignac number, because 40045565 - 2⁶ = 40045501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6194 + ... + 10883.

It is an arithmetic number, because the mean of its divisors is an integer number (3483912).

Almost surely, 2^40045565 is an apocalyptic number.

It is an amenable number.

40045565 is a deficient number, since it is larger than the sum of its proper divisors (15697027).

40045565 is a wasteful number, since it uses less digits than its factorization.

40045565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17156.

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 40045565 is about 6328.1565246128. The cubic root of 40045565 is about 342.1249984815.

Adding to 40045565 its reverse (56554004), we get a palindrome (96599569).

The spelling of 40045565 in words is "forty million, forty-five thousand, five hundred sixty-five".