40005716565 has 24 divisors (see below), whose sum is σ = 67995882720. Its totient is φ = 20081298688.

The previous prime is 40005716561. The next prime is 40005716567. The reversal of 40005716565 is 56561750004.

It is not a de Polignac number, because 40005716565 - 2² = 40005716561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40005716561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4609935 + ... + 4618604.

It is an arithmetic number, because the mean of its divisors is an integer number (2833161780).

Almost surely, 2^40005716565 is an apocalyptic number.

It is an amenable number.

40005716565 is a deficient number, since it is larger than the sum of its proper divisors (27990166155).

40005716565 is a wasteful number, since it uses less digits than its factorization.

40005716565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9228581 (or 9228564 counting only the distinct ones).

The product of its (nonzero) digits is 126000, while the sum is 39.

The spelling of 40005716565 in words is "forty billion, five million, seven hundred sixteen thousand, five hundred sixty-five".