40405605044 has 24 divisors (see below), whose sum is σ = 82017351360. Its totient is φ = 17058229056.

The previous prime is 40405605043. The next prime is 40405605061. The reversal of 40405605044 is 44050650404.

It is a super-2 number, since 2×40405605044² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40405605044.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40405605043) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10767209 + ... + 10770960.

It is an arithmetic number, because the mean of its divisors is an integer number (3417389640).

Almost surely, 2^40405605044 is an apocalyptic number.

It is an amenable number.

40405605044 is an abundant number, since it is smaller than the sum of its proper divisors (41611746316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40405605044 is a wasteful number, since it uses less digits than its factorization.

40405605044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21538247 (or 21538245 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 32.

The spelling of 40405605044 in words is "forty billion, four hundred five million, six hundred five thousand, forty-four".