40040810405 has 16 divisors (see below), whose sum is σ = 49427714160. Its totient is φ = 31116298752.

The previous prime is 40040810399. The next prime is 40040810437. The reversal of 40040810405 is 50401804004.

40040810405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 200102²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 1 + 40040810404 = 1^2 + 200102^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040810405 - 2⁴ = 40040810389 is a prime.

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, 61250 + ... + 289539.

It is an arithmetic number, because the mean of its divisors is an integer number (3089232135).

Almost surely, 2^40040810405 is an apocalyptic number.

It is an amenable number.

40040810405 is a deficient number, since it is larger than the sum of its proper divisors (9386903755).

40040810405 is a wasteful number, since it uses less digits than its factorization.

40040810405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351448.

The product of its (nonzero) digits is 2560, while the sum is 26.

The spelling of 40040810405 in words is "forty billion, forty million, eight hundred ten thousand, four hundred five".