40400400400405 has 8 divisors (see below), whose sum is σ = 48484771236000. Its totient is φ = 32317459816656.

The previous prime is 40400400400403. The next prime is 40400400400441. The reversal of 40400400400405 is 50400400400404.

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 40400400400405 - 2¹ = 40400400400403 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40400400400405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40400400400403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 357500815 + ... + 357613804.

It is an arithmetic number, because the mean of its divisors is an integer number (6060596404500).

Almost surely, 2^{40400400400405} is an apocalyptic number.

It is an amenable number.

40400400400405 is a deficient number, since it is larger than the sum of its proper divisors (8084370835595).

40400400400405 is a wasteful number, since it uses less digits than its factorization.

40400400400405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715125923.

The product of its (nonzero) digits is 5120, while the sum is 25.

Adding to 40400400400405 its reverse (50400400400404), we get a palindrome (90800800800809).

Subtracting 40400400400405 from its reverse (50400400400404), we obtain a palindrome (9999999999999).

The spelling of 40400400400405 in words is "forty trillion, four hundred billion, four hundred million, four hundred thousand, four hundred five".