40564432565 has 8 divisors (see below), whose sum is σ = 51239283360. Its totient is φ = 30743569872.

The previous prime is 40564432561. The next prime is 40564432591. The reversal of 40564432565 is 56523446504.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 40564432565 - 2² = 40564432561 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40564432561) by changing a digit.

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, 213496919 + ... + 213497108.

It is an arithmetic number, because the mean of its divisors is an integer number (6404910420).

Almost surely, 2^40564432565 is an apocalyptic number.

It is an amenable number.

40564432565 is a deficient number, since it is larger than the sum of its proper divisors (10674850795).

40564432565 is a wasteful number, since it uses less digits than its factorization.

40564432565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426994051.

The product of its (nonzero) digits is 1728000, while the sum is 44.

The spelling of 40564432565 in words is "forty billion, five hundred sixty-four million, four hundred thirty-two thousand, five hundred sixty-five".