40205104665 has 32 divisors (see below), whose sum is σ = 70371763200. Its totient is φ = 19439056320.

The previous prime is 40205104649. The next prime is 40205104721. The reversal of 40205104665 is 56640150204.

It is not a de Polignac number, because 40205104665 - 2⁴ = 40205104649 is a prime.

It is a super-2 number, since 2×40205104665² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 280135 + ... + 398604.

It is an arithmetic number, because the mean of its divisors is an integer number (2199117600).

Almost surely, 2^40205104665 is an apocalyptic number.

It is an amenable number.

40205104665 is a deficient number, since it is larger than the sum of its proper divisors (30166658535).

40205104665 is a wasteful number, since it uses less digits than its factorization.

40205104665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679117.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 40205104665 its reverse (56640150204), we get a palindrome (96845254869).

The spelling of 40205104665 in words is "forty billion, two hundred five million, one hundred four thousand, six hundred sixty-five".